diff --git a/app/assets/javascripts/integrations/edit/components/jira_issues_fields.vue b/app/assets/javascripts/integrations/edit/components/jira_issues_fields.vue
index f8a44f0c2a2..d3d1fd8ddc3 100644
--- a/app/assets/javascripts/integrations/edit/components/jira_issues_fields.vue
+++ b/app/assets/javascripts/integrations/edit/components/jira_issues_fields.vue
@@ -49,7 +49,7 @@ export default {
     initialVulnerabilitiesIssuetype: {
       type: String,
       required: false,
-      default: '',
+      default: undefined,
     },
     initialProjectKey: {
       type: String,
diff --git a/app/assets/javascripts/pages/projects/jobs/index/index.js b/app/assets/javascripts/pages/projects/jobs/index/index.js
index f66c09cb1ac..6a70d4cf26d 100644
--- a/app/assets/javascripts/pages/projects/jobs/index/index.js
+++ b/app/assets/javascripts/pages/projects/jobs/index/index.js
@@ -1,6 +1,5 @@
 import Vue from 'vue';
 import GlCountdown from '~/vue_shared/components/gl_countdown.vue';
-import Tracking from '~/tracking';
 
 document.addEventListener('DOMContentLoaded', () => {
   const remainingTimeElements = document.querySelectorAll('.js-remaining-time');
@@ -17,13 +16,4 @@ document.addEventListener('DOMContentLoaded', () => {
         },
       }),
   );
-
-  const trackButtonClick = () => {
-    if (gon.tracking_data) {
-      const { category, action, ...data } = gon.tracking_data;
-      Tracking.event(category, action, data);
-    }
-  };
-  const buttons = document.querySelectorAll('.js-empty-state-button');
-  buttons.forEach((button) => button.addEventListener('click', trackButtonClick));
 });
diff --git a/app/controllers/groups/dependency_proxy_for_containers_controller.rb b/app/controllers/groups/dependency_proxy_for_containers_controller.rb
index ff3c24a91a1..0f640397320 100644
--- a/app/controllers/groups/dependency_proxy_for_containers_controller.rb
+++ b/app/controllers/groups/dependency_proxy_for_containers_controller.rb
@@ -16,12 +16,7 @@ class Groups::DependencyProxyForContainersController < Groups::ApplicationContro
     result = DependencyProxy::FindOrCreateManifestService.new(group, image, tag, token).execute
 
     if result[:status] == :success
-      response.headers['Docker-Content-Digest'] = result[:manifest].digest
-      response.headers['Content-Length'] = result[:manifest].size
-      response.headers['Docker-Distribution-Api-Version'] = DependencyProxy::DISTRIBUTION_API_VERSION
-      response.headers['Etag'] = "\"#{result[:manifest].digest}\""
-
-      send_upload(result[:manifest].file, send_params: { type: result[:manifest].content_type })
+      send_upload(result[:manifest].file)
     else
       render status: result[:http_status], json: result[:message]
     end
diff --git a/app/controllers/projects/jobs_controller.rb b/app/controllers/projects/jobs_controller.rb
index d2703f5cc38..8a2ea51ba9d 100644
--- a/app/controllers/projects/jobs_controller.rb
+++ b/app/controllers/projects/jobs_controller.rb
@@ -15,9 +15,6 @@ class Projects::JobsController < Projects::ApplicationController
   before_action :verify_api_request!, only: :terminal_websocket_authorize
   before_action :authorize_create_proxy_build!, only: :proxy_websocket_authorize
   before_action :verify_proxy_request!, only: :proxy_websocket_authorize
-  before_action only: :index do
-    frontend_experimentation_tracking_data(:jobs_empty_state, 'click_button')
-  end
 
   layout 'project'
 
diff --git a/app/models/dependency_proxy.rb b/app/models/dependency_proxy.rb
index 0ed17921aaa..9cbaf7e9884 100644
--- a/app/models/dependency_proxy.rb
+++ b/app/models/dependency_proxy.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 module DependencyProxy
   URL_SUFFIX = '/dependency_proxy/containers'
-  DISTRIBUTION_API_VERSION = 'registry/2.0'
 
   def self.table_name_prefix
     'dependency_proxy_'
diff --git a/app/models/dependency_proxy/manifest.rb b/app/models/dependency_proxy/manifest.rb
index d613d5708f0..f3c7f34e0d7 100644
--- a/app/models/dependency_proxy/manifest.rb
+++ b/app/models/dependency_proxy/manifest.rb
@@ -12,10 +12,5 @@ class DependencyProxy::Manifest < ApplicationRecord
 
   mount_file_store_uploader DependencyProxy::FileUploader
 
-  def self.find_or_initialize_by_file_name_or_digest(file_name:, digest:)
-    result = find_by(file_name: file_name) || find_by(digest: digest)
-    return result if result
-
-    new(file_name: file_name, digest: digest)
-  end
+  scope :find_or_initialize_by_file_name, ->(file_name) { find_or_initialize_by(file_name: file_name) }
 end
diff --git a/app/models/packages/debian/project_distribution.rb b/app/models/packages/debian/project_distribution.rb
index a73c12d172d..22f1008b3b5 100644
--- a/app/models/packages/debian/project_distribution.rb
+++ b/app/models/packages/debian/project_distribution.rb
@@ -5,5 +5,8 @@ class Packages::Debian::ProjectDistribution < ApplicationRecord
     :project
   end
 
+  has_many :publications, class_name: 'Packages::Debian::Publication', inverse_of: :distribution, foreign_key: :distribution_id
+  has_many :packages, class_name: 'Packages::Package', through: :publications
+
   include Packages::Debian::Distribution
 end
diff --git a/app/models/packages/debian/publication.rb b/app/models/packages/debian/publication.rb
new file mode 100644
index 00000000000..93f5aa11d81
--- /dev/null
+++ b/app/models/packages/debian/publication.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class Packages::Debian::Publication < ApplicationRecord
+  belongs_to :package,
+    -> { where(package_type: :debian).where.not(version: nil) },
+    inverse_of: :debian_publication,
+    class_name: 'Packages::Package'
+  belongs_to :distribution,
+    inverse_of: :publications,
+    class_name: 'Packages::Debian::ProjectDistribution',
+    foreign_key: :distribution_id
+
+  validates :package, presence: true
+  validate :valid_debian_package_type
+
+  validates :distribution, presence: true
+
+  private
+
+  def valid_debian_package_type
+    return errors.add(:package, _('type must be Debian')) unless package&.debian?
+    return errors.add(:package, _('must be a Debian package')) unless package.debian_package?
+  end
+end
diff --git a/app/models/packages/package.rb b/app/models/packages/package.rb
index 2067a800ad5..4200f68d8fd 100644
--- a/app/models/packages/package.rb
+++ b/app/models/packages/package.rb
@@ -19,11 +19,15 @@ class Packages::Package < ApplicationRecord
   has_one :composer_metadatum, inverse_of: :package, class_name: 'Packages::Composer::Metadatum'
   has_many :build_infos, inverse_of: :package
   has_many :pipelines, through: :build_infos
+  has_one :debian_publication, inverse_of: :package, class_name: 'Packages::Debian::Publication'
+  has_one :debian_distribution, through: :debian_publication, source: :distribution, inverse_of: :packages, class_name: 'Packages::Debian::ProjectDistribution'
 
   accepts_nested_attributes_for :conan_metadatum
+  accepts_nested_attributes_for :debian_publication
   accepts_nested_attributes_for :maven_metadatum
 
   delegate :recipe, :recipe_path, to: :conan_metadatum, prefix: :conan
+  delegate :codename, :suite, to: :debian_distribution, prefix: :debian_distribution
 
   validates :project, presence: true
   validates :name, presence: true
@@ -31,7 +35,8 @@ class Packages::Package < ApplicationRecord
   validates :name, format: { with: Gitlab::Regex.package_name_regex }, unless: -> { conan? || generic? || debian? }
 
   validates :name,
-    uniqueness: { scope: %i[project_id version package_type] }, unless: :conan?
+    uniqueness: { scope: %i[project_id version package_type] }, unless: -> { conan? || debian_package? }
+  validate :unique_debian_package_name, if: :debian_package?
 
   validate :valid_conan_package_recipe, if: :conan?
   validate :valid_npm_package_name, if: :npm?
@@ -251,6 +256,18 @@ class Packages::Package < ApplicationRecord
     end
   end
 
+  def unique_debian_package_name
+    return unless debian_publication&.distribution
+
+    package_exists = debian_publication.distribution.packages
+                            .with_name(name)
+                            .with_version(version)
+                            .id_not_in(id)
+                            .exists?
+
+    errors.add(:base, _('Debian package already exists in Distribution')) if package_exists
+  end
+
   def forbidden_debian_changes
     return unless persisted?
 
diff --git a/app/services/dependency_proxy/find_or_create_manifest_service.rb b/app/services/dependency_proxy/find_or_create_manifest_service.rb
index ee608d715aa..6b46f5e4c59 100644
--- a/app/services/dependency_proxy/find_or_create_manifest_service.rb
+++ b/app/services/dependency_proxy/find_or_create_manifest_service.rb
@@ -13,7 +13,7 @@ module DependencyProxy
 
     def execute
       @manifest = @group.dependency_proxy_manifests
-                        .find_or_initialize_by_file_name_or_digest(file_name: @file_name, digest: @tag)
+                        .find_or_initialize_by_file_name(@file_name)
 
       head_result = DependencyProxy::HeadManifestService.new(@image, @tag, @token).execute
 
@@ -30,7 +30,6 @@ module DependencyProxy
     def pull_new_manifest
       DependencyProxy::PullManifestService.new(@image, @tag, @token).execute_with_manifest do |new_manifest|
         @manifest.update!(
-          content_type: new_manifest[:content_type],
           digest: new_manifest[:digest],
           file: new_manifest[:file],
           size: new_manifest[:file].size
@@ -39,9 +38,7 @@ module DependencyProxy
     end
 
     def cached_manifest_matches?(head_result)
-      return false if head_result[:status] == :error
-
-      @manifest && @manifest.digest == head_result[:digest] && @manifest.content_type == head_result[:content_type]
+      @manifest && @manifest.digest == head_result[:digest]
     end
 
     def respond
diff --git a/app/services/dependency_proxy/head_manifest_service.rb b/app/services/dependency_proxy/head_manifest_service.rb
index ecc3eb77399..87d9c417c98 100644
--- a/app/services/dependency_proxy/head_manifest_service.rb
+++ b/app/services/dependency_proxy/head_manifest_service.rb
@@ -2,8 +2,6 @@
 
 module DependencyProxy
   class HeadManifestService < DependencyProxy::BaseService
-    ACCEPT_HEADERS = ::ContainerRegistry::Client::ACCEPTED_TYPES.join(',')
-
     def initialize(image, tag, token)
       @image = image
       @tag = tag
@@ -11,10 +9,10 @@ module DependencyProxy
     end
 
     def execute
-      response = Gitlab::HTTP.head(manifest_url, headers: auth_headers.merge(Accept: ACCEPT_HEADERS))
+      response = Gitlab::HTTP.head(manifest_url, headers: auth_headers)
 
       if response.success?
-        success(digest: response.headers['docker-content-digest'], content_type: response.headers['content-type'])
+        success(digest: response.headers['docker-content-digest'])
       else
         error(response.body, response.code)
       end
diff --git a/app/services/dependency_proxy/pull_manifest_service.rb b/app/services/dependency_proxy/pull_manifest_service.rb
index 737414c396e..5c804489fd1 100644
--- a/app/services/dependency_proxy/pull_manifest_service.rb
+++ b/app/services/dependency_proxy/pull_manifest_service.rb
@@ -11,7 +11,7 @@ module DependencyProxy
     def execute_with_manifest
       raise ArgumentError, 'Block must be provided' unless block_given?
 
-      response = Gitlab::HTTP.get(manifest_url, headers: auth_headers.merge(Accept: ::ContainerRegistry::Client::ACCEPTED_TYPES.join(',')))
+      response = Gitlab::HTTP.get(manifest_url, headers: auth_headers)
 
       if response.success?
         file = Tempfile.new
@@ -20,7 +20,7 @@ module DependencyProxy
           file.write(response)
           file.flush
 
-          yield(success(file: file, digest: response.headers['docker-content-digest'], content_type: response.headers['content-type']))
+          yield(success(file: file, digest: response.headers['docker-content-digest']))
         ensure
           file.close
           file.unlink
diff --git a/app/views/projects/jobs/_table.html.haml b/app/views/projects/jobs/_table.html.haml
index b126b452dea..402f7ddb38d 100644
--- a/app/views/projects/jobs/_table.html.haml
+++ b/app/views/projects/jobs/_table.html.haml
@@ -1,7 +1,7 @@
 - admin = local_assigns.fetch(:admin, false)
 
 - if builds.blank?
-  - if experiment_enabled?(:jobs_empty_state)
+  - if @project
     .row.empty-state
       .col-12
         .svg-content.svg-250
@@ -12,7 +12,7 @@
             = s_('Jobs|Use jobs to automate your tasks')
           %p
             = s_('Jobs|Jobs are the building blocks of a GitLab CI/CD pipeline. Each job has a specific task, like testing code. To set up jobs in a CI/CD pipeline, add a CI/CD configuration file to your project.')
-          = link_to s_('Jobs|Create CI/CD configuration file'), help_page_path('ci/quick_start/README'), class: 'btn gl-button btn-info js-empty-state-button'
+          = link_to s_('Jobs|Create CI/CD configuration file'), @project.present(current_user: current_user).add_ci_yml_path, class: 'btn gl-button btn-info js-empty-state-button'
   - else
     .nothing-here-block= s_('Jobs|No jobs to show')
 - else
diff --git a/app/views/projects/jobs/index.html.haml b/app/views/projects/jobs/index.html.haml
index e14473708af..a0ec6002db7 100644
--- a/app/views/projects/jobs/index.html.haml
+++ b/app/views/projects/jobs/index.html.haml
@@ -7,9 +7,6 @@
 
   .nav-controls
     - if can?(current_user, :update_build, @project)
-      - if !@repository.gitlab_ci_yml && !experiment_enabled?(:jobs_empty_state)
-        = link_to s_('Pipelines|Get started with Pipelines'), help_page_path('ci/quick_start/README'), class: 'btn gl-button btn-info js-empty-state-button'
-
       = link_to project_ci_lint_path(@project), class: 'btn gl-button btn-default' do
         %span
           = _('CI Lint')
diff --git a/changelogs/unreleased/290944-pull-by-digest.yml b/changelogs/unreleased/290944-pull-by-digest.yml
index eea16bb359b..911f6be7e9c 100644
--- a/changelogs/unreleased/290944-pull-by-digest.yml
+++ b/changelogs/unreleased/290944-pull-by-digest.yml
@@ -1,5 +1,5 @@
 ---
-title: Pull-by-digest and Docker 20.x support for the Dependency Proxy
+title: Add content_type column to dependency_proxy_manifests
 merge_request: 52805
 author:
 type: changed
diff --git a/changelogs/unreleased/300860-jobs-empty-state-successful-cleanup.yml b/changelogs/unreleased/300860-jobs-empty-state-successful-cleanup.yml
new file mode 100644
index 00000000000..1442d008f88
--- /dev/null
+++ b/changelogs/unreleased/300860-jobs-empty-state-successful-cleanup.yml
@@ -0,0 +1,5 @@
+---
+title: Add empty jobs page with link to editor
+merge_request: 53240
+author:
+type: added
diff --git a/changelogs/unreleased/debian_publications.yml b/changelogs/unreleased/debian_publications.yml
new file mode 100644
index 00000000000..d9310539e62
--- /dev/null
+++ b/changelogs/unreleased/debian_publications.yml
@@ -0,0 +1,5 @@
+---
+title: Debian Publications
+merge_request: 52916
+author: Mathieu Parent
+type: added
diff --git a/changelogs/unreleased/mc-api-pipeline-webhook-remove-retried-jobs.yml b/changelogs/unreleased/mc-api-pipeline-webhook-remove-retried-jobs.yml
new file mode 100644
index 00000000000..f75824b04ce
--- /dev/null
+++ b/changelogs/unreleased/mc-api-pipeline-webhook-remove-retried-jobs.yml
@@ -0,0 +1,5 @@
+---
+title: Send only latest jobs in pipeline webhook payload.
+merge_request: 53159
+author:
+type: fixed
diff --git a/changelogs/unreleased/revert-pull-by-digest.yml b/changelogs/unreleased/revert-pull-by-digest.yml
new file mode 100644
index 00000000000..b2de5e27638
--- /dev/null
+++ b/changelogs/unreleased/revert-pull-by-digest.yml
@@ -0,0 +1,6 @@
+---
+title: Remove dependency_proxy_manifests records with content_type to prevent Dependency
+  Proxy failures
+merge_request: 53506
+author:
+type: fixed
diff --git a/config/feature_flags/experiment/jobs_empty_state_experiment_percentage.yml b/config/feature_flags/experiment/jobs_empty_state_experiment_percentage.yml
deleted file mode 100644
index 33a15e28d44..00000000000
--- a/config/feature_flags/experiment/jobs_empty_state_experiment_percentage.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: jobs_empty_state_experiment_percentage
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/48686
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/281054
-milestone: '13.7'
-type: experiment
-group: group::activation
-default_enabled: false
diff --git a/db/migrate/20201204111600_create_packages_debian_publications.rb b/db/migrate/20201204111600_create_packages_debian_publications.rb
new file mode 100644
index 00000000000..2fd26c2c367
--- /dev/null
+++ b/db/migrate/20201204111600_create_packages_debian_publications.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class CreatePackagesDebianPublications < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    create_table :packages_debian_publications do |t|
+      t.references :package,
+        index: { unique: true },
+        null: false,
+        foreign_key: { to_table: :packages_packages, on_delete: :cascade }
+      t.references :distribution,
+        null: false,
+        foreign_key: { to_table: :packages_debian_project_distributions, on_delete: :cascade }
+    end
+  end
+end
diff --git a/db/post_migrate/20210205174154_remove_bad_dependency_proxy_manifests.rb b/db/post_migrate/20210205174154_remove_bad_dependency_proxy_manifests.rb
new file mode 100644
index 00000000000..eb302fb7009
--- /dev/null
+++ b/db/post_migrate/20210205174154_remove_bad_dependency_proxy_manifests.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class RemoveBadDependencyProxyManifests < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    # We run destroy on each record because we need the callback to remove
+    # the underlying files
+    DependencyProxy::Manifest.where.not(content_type: nil).destroy_all # rubocop:disable Cop/DestroyAll
+  end
+
+  def down
+    # no op
+  end
+end
diff --git a/db/schema_migrations/20201204111600 b/db/schema_migrations/20201204111600
new file mode 100644
index 00000000000..d6c5e232962
--- /dev/null
+++ b/db/schema_migrations/20201204111600
@@ -0,0 +1 @@
+51967d740ce184b27d0d9417fc86cb896fd3e3aa8a5e40759b290f47b9f3e99b
\ No newline at end of file
diff --git a/db/schema_migrations/20210205174154 b/db/schema_migrations/20210205174154
new file mode 100644
index 00000000000..fc8c4b6cff1
--- /dev/null
+++ b/db/schema_migrations/20210205174154
@@ -0,0 +1 @@
+483d1b4a24086fa57efe7f3b3fa872cf793352f80aba5c25614f07eafa2d30c5
\ No newline at end of file
diff --git a/db/structure.sql b/db/structure.sql
index e9628af9a0d..8c1ed479c69 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -15030,6 +15030,21 @@ CREATE SEQUENCE packages_debian_project_distributions_id_seq
 
 ALTER SEQUENCE packages_debian_project_distributions_id_seq OWNED BY packages_debian_project_distributions.id;
 
+CREATE TABLE packages_debian_publications (
+    id bigint NOT NULL,
+    package_id bigint NOT NULL,
+    distribution_id bigint NOT NULL
+);
+
+CREATE SEQUENCE packages_debian_publications_id_seq
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+ALTER SEQUENCE packages_debian_publications_id_seq OWNED BY packages_debian_publications.id;
+
 CREATE TABLE packages_dependencies (
     id bigint NOT NULL,
     name character varying(255) NOT NULL,
@@ -19015,6 +19030,8 @@ ALTER TABLE ONLY packages_debian_project_components ALTER COLUMN id SET DEFAULT
 
 ALTER TABLE ONLY packages_debian_project_distributions ALTER COLUMN id SET DEFAULT nextval('packages_debian_project_distributions_id_seq'::regclass);
 
+ALTER TABLE ONLY packages_debian_publications ALTER COLUMN id SET DEFAULT nextval('packages_debian_publications_id_seq'::regclass);
+
 ALTER TABLE ONLY packages_dependencies ALTER COLUMN id SET DEFAULT nextval('packages_dependencies_id_seq'::regclass);
 
 ALTER TABLE ONLY packages_dependency_links ALTER COLUMN id SET DEFAULT nextval('packages_dependency_links_id_seq'::regclass);
@@ -20398,6 +20415,9 @@ ALTER TABLE ONLY packages_debian_project_components
 ALTER TABLE ONLY packages_debian_project_distributions
     ADD CONSTRAINT packages_debian_project_distributions_pkey PRIMARY KEY (id);
 
+ALTER TABLE ONLY packages_debian_publications
+    ADD CONSTRAINT packages_debian_publications_pkey PRIMARY KEY (id);
+
 ALTER TABLE ONLY packages_dependencies
     ADD CONSTRAINT packages_dependencies_pkey PRIMARY KEY (id);
 
@@ -22623,6 +22643,10 @@ CREATE INDEX index_packages_debian_project_distributions_on_creator_id ON packag
 
 CREATE INDEX index_packages_debian_project_distributions_on_project_id ON packages_debian_project_distributions USING btree (project_id);
 
+CREATE INDEX index_packages_debian_publications_on_distribution_id ON packages_debian_publications USING btree (distribution_id);
+
+CREATE UNIQUE INDEX index_packages_debian_publications_on_package_id ON packages_debian_publications USING btree (package_id);
+
 CREATE UNIQUE INDEX index_packages_dependencies_on_name_and_version_pattern ON packages_dependencies USING btree (name, version_pattern);
 
 CREATE INDEX index_packages_dependency_links_on_dependency_id ON packages_dependency_links USING btree (dependency_id);
@@ -25032,6 +25056,9 @@ ALTER TABLE ONLY aws_roles
 ALTER TABLE ONLY security_scans
     ADD CONSTRAINT fk_rails_4ef1e6b4c6 FOREIGN KEY (build_id) REFERENCES ci_builds(id) ON DELETE CASCADE;
 
+ALTER TABLE ONLY packages_debian_publications
+    ADD CONSTRAINT fk_rails_4fc8ebd03e FOREIGN KEY (distribution_id) REFERENCES packages_debian_project_distributions(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY merge_request_diff_files
     ADD CONSTRAINT fk_rails_501aa0a391 FOREIGN KEY (merge_request_diff_id) REFERENCES merge_request_diffs(id) ON DELETE CASCADE;
 
@@ -25275,6 +25302,9 @@ ALTER TABLE ONLY x509_certificates
 ALTER TABLE ONLY pages_domain_acme_orders
     ADD CONSTRAINT fk_rails_76581b1c16 FOREIGN KEY (pages_domain_id) REFERENCES pages_domains(id) ON DELETE CASCADE;
 
+ALTER TABLE ONLY packages_debian_publications
+    ADD CONSTRAINT fk_rails_7668c1d606 FOREIGN KEY (package_id) REFERENCES packages_packages(id) ON DELETE CASCADE;
+
 ALTER TABLE ONLY boards_epic_user_preferences
     ADD CONSTRAINT fk_rails_76c4e9732d FOREIGN KEY (epic_id) REFERENCES epics(id) ON DELETE CASCADE;
 
diff --git a/doc/user/packages/dependency_proxy/index.md b/doc/user/packages/dependency_proxy/index.md
index 878354ab264..b45d0ac9500 100644
--- a/doc/user/packages/dependency_proxy/index.md
+++ b/doc/user/packages/dependency_proxy/index.md
@@ -7,10 +7,9 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 # Dependency Proxy
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/7934) in [GitLab Premium](https://about.gitlab.com/pricing/) 11.11.
-> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/273655) to [GitLab Free](https://about.gitlab.com/pricing/) in GitLab 13.6.
-> - [Support for private groups](https://gitlab.com/gitlab-org/gitlab/-/issues/11582) in [GitLab Free](https://about.gitlab.com/pricing/) 13.7.
-> - Anonymous access to images in public groups is no longer available starting in [GitLab Free](https://about.gitlab.com/pricing/) 13.7.
-> - [Support for pull-by-digest and Docker version 20.x](https://gitlab.com/gitlab-org/gitlab/-/issues/290944) in [GitLab Free](https://about.gitlab.com/pricing/) 13.9.
+> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/273655) to [GitLab Core](https://about.gitlab.com/pricing/) in GitLab 13.6.
+> - [Support for private groups](https://gitlab.com/gitlab-org/gitlab/-/issues/11582) in [GitLab Core](https://about.gitlab.com/pricing/) 13.7.
+> - Anonymous access to images in public groups is no longer available starting in [GitLab Core](https://about.gitlab.com/pricing/) 13.7.
 
 The GitLab Dependency Proxy is a local proxy you can use for your frequently-accessed
 upstream images.
@@ -18,6 +17,11 @@ upstream images.
 In the case of CI/CD, the Dependency Proxy receives a request and returns the
 upstream image from a registry, acting as a pull-through cache.
 
+NOTE:
+The Dependency Proxy is not compatible with Docker version 20.x and later.
+If you are using the Dependency Proxy, Docker version 19.x.x is recommended until
+[issue #290944](https://gitlab.com/gitlab-org/gitlab/-/issues/290944) is resolved.
+
 ## Prerequisites
 
 The Dependency Proxy must be [enabled by an administrator](../../../administration/packages/dependency_proxy.md).
@@ -56,7 +60,7 @@ Prerequisites:
 
 ### Authenticate with the Dependency Proxy
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/11582) in [GitLab Free](https://about.gitlab.com/pricing/) 13.7.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/11582) in [GitLab Core](https://about.gitlab.com/pricing/) 13.7.
 > - It's [deployed behind a feature flag](../../feature_flags.md), enabled by default.
 > - It's enabled on GitLab.com.
 > - It's recommended for production use.
@@ -158,7 +162,7 @@ the [Dependency Proxy API](../../../api/dependency_proxy.md).
 
 ## Docker Hub rate limits and the Dependency Proxy
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/241639) in [GitLab Free](https://about.gitlab.com/pricing/) 13.7.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/241639) in [GitLab Core](https://about.gitlab.com/pricing/) 13.7.
 
 <i class="fa fa-youtube-play youtube" aria-hidden="true"></i>
 Watch how to [use the Dependency Proxy to help avoid Docker Hub rate limits](https://youtu.be/Nc4nUo7Pq08).
diff --git a/doc/user/project/integrations/webhooks.md b/doc/user/project/integrations/webhooks.md
index 27c2cb08d10..0cf01adef13 100644
--- a/doc/user/project/integrations/webhooks.md
+++ b/doc/user/project/integrations/webhooks.md
@@ -1029,6 +1029,9 @@ X-Gitlab-Event: Wiki Page Hook
 
 ### Pipeline events
 
+In [GitLab 13.9](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/53159)
+and later, the pipeline webhook returns only the latest jobs.
+
 Triggered on status change of Pipeline.
 
 **Request Header**:
diff --git a/lib/gitlab/data_builder/pipeline.rb b/lib/gitlab/data_builder/pipeline.rb
index 2413f68f4d0..3036bc57ca5 100644
--- a/lib/gitlab/data_builder/pipeline.rb
+++ b/lib/gitlab/data_builder/pipeline.rb
@@ -13,7 +13,7 @@ module Gitlab
           user: pipeline.user.try(:hook_attrs),
           project: pipeline.project.hook_attrs(backward: false),
           commit: pipeline.commit.try(:hook_attrs),
-          builds: pipeline.builds.map(&method(:build_hook_attrs))
+          builds: pipeline.builds.latest.map(&method(:build_hook_attrs))
         }
       end
 
diff --git a/lib/gitlab/experimentation.rb b/lib/gitlab/experimentation.rb
index a5143839182..0deda3596f5 100644
--- a/lib/gitlab/experimentation.rb
+++ b/lib/gitlab/experimentation.rb
@@ -66,9 +66,6 @@ module Gitlab
         tracking_category: 'Growth::Conversion::Experiment::GroupOnlyTrials',
         use_backwards_compatible_subject_index: true
       },
-      jobs_empty_state: {
-        tracking_category: 'Growth::Activation::Experiment::JobsEmptyState'
-      },
       remove_known_trial_form_fields: {
         tracking_category: 'Growth::Conversion::Experiment::RemoveKnownTrialFormFields'
       },
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 1d246e9ee25..2ac62c8f808 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -9290,6 +9290,9 @@ msgstr ""
 msgid "Dear Administrator,"
 msgstr ""
 
+msgid "Debian package already exists in Distribution"
+msgstr ""
+
 msgid "Debug"
 msgstr ""
 
@@ -21511,9 +21514,6 @@ msgstr ""
 msgid "Pipelines|Get started with CI/CD"
 msgstr ""
 
-msgid "Pipelines|Get started with Pipelines"
-msgstr ""
-
 msgid "Pipelines|GitLab CI/CD can automatically build, test, and deploy your code. Let GitLab take care of time consuming tasks, so you can spend more time creating."
 msgstr ""
 
@@ -34940,6 +34940,9 @@ msgstr ""
 msgid "mrWidget|to start a merge train when the pipeline succeeds"
 msgstr ""
 
+msgid "must be a Debian package"
+msgstr ""
+
 msgid "must be a boolean value"
 msgstr ""
 
@@ -35316,6 +35319,9 @@ msgstr ""
 msgid "two-factor authentication settings"
 msgstr ""
 
+msgid "type must be Debian"
+msgstr ""
+
 msgid "unicode domains should use IDNA encoding"
 msgstr ""
 
diff --git a/qa/spec/support/matchers/have_assignee.rb b/qa/spec/support/matchers/have_assignee.rb
deleted file mode 100644
index 5e7aa2162b2..00000000000
--- a/qa/spec/support/matchers/have_assignee.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveAssignee
-    RSpec::Matchers.define :have_assignee do |assignee|
-      match do |page_object|
-        page_object.has_assignee?(assignee)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_assignee?(assignee)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_child_pipeline.rb b/qa/spec/support/matchers/have_child_pipeline.rb
deleted file mode 100644
index d05d9d4209a..00000000000
--- a/qa/spec/support/matchers/have_child_pipeline.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveChildPipeline
-    RSpec::Matchers.define :have_child_pipeline do
-      match do |page_object|
-        page_object.has_child_pipeline?
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_child_pipeline?
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_content.rb b/qa/spec/support/matchers/have_content.rb
deleted file mode 100644
index 66b30b3b6e4..00000000000
--- a/qa/spec/support/matchers/have_content.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveContent
-    RSpec::Matchers.define :have_content do |content|
-      match do |page_object|
-        page_object.has_content?(content)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_content?(content)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_design.rb b/qa/spec/support/matchers/have_design.rb
deleted file mode 100644
index 85f1367297a..00000000000
--- a/qa/spec/support/matchers/have_design.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveDesign
-    RSpec::Matchers.define :have_design do |design|
-      match do |page_object|
-        page_object.has_design?(design)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_design?(design)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_element.rb b/qa/spec/support/matchers/have_element.rb
deleted file mode 100644
index bf74a78a3b5..00000000000
--- a/qa/spec/support/matchers/have_element.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveElement
-    RSpec::Matchers.define :have_element do |element, **kwargs|
-      match do |page_object|
-        page_object.has_element?(element, **kwargs)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_element?(element, **kwargs)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_file.rb b/qa/spec/support/matchers/have_file.rb
deleted file mode 100644
index 2ae295d5ca2..00000000000
--- a/qa/spec/support/matchers/have_file.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveFile
-    RSpec::Matchers.define :have_file do |file|
-      match do |page_object|
-        page_object.has_file?(file)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_file?(file)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_file_content.rb b/qa/spec/support/matchers/have_file_content.rb
deleted file mode 100644
index e42ece6d59e..00000000000
--- a/qa/spec/support/matchers/have_file_content.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveFileContent
-    RSpec::Matchers.define :have_file_content do |file_content, file_number|
-      match do |page_object|
-        page_object.has_file_content?(file_content, file_number)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_file_content?(file_content, file_number)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_issue.rb b/qa/spec/support/matchers/have_issue.rb
deleted file mode 100644
index 7ef30f22726..00000000000
--- a/qa/spec/support/matchers/have_issue.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveIssue
-    RSpec::Matchers.define :have_issue do |issue|
-      match do |page_object|
-        page_object.has_issue?(issue)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_issue?(issue)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_job.rb b/qa/spec/support/matchers/have_job.rb
deleted file mode 100644
index 89829915fce..00000000000
--- a/qa/spec/support/matchers/have_job.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveJob
-    RSpec::Matchers.define :have_job do |job|
-      match do |page_object|
-        page_object.has_job?(job)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_job?(job)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_matcher.rb b/qa/spec/support/matchers/have_matcher.rb
new file mode 100644
index 00000000000..43ae27f8796
--- /dev/null
+++ b/qa/spec/support/matchers/have_matcher.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module Matchers
+  PREDICATE_TARGETS = %w[
+    element
+    file_content
+    assignee
+    child_pipeline
+    content
+    design
+    file
+    issue
+    job
+    package
+    pipeline
+    related_issue_item
+    snippet_description
+  ].each do |predicate|
+    RSpec::Matchers.define "have_#{predicate}" do |*args, **kwargs|
+      match do |page_object|
+        page_object.public_send("has_#{predicate}?", *args, **kwargs) # rubocop:disable GitlabSecurity/PublicSend
+      end
+
+      match_when_negated do |page_object|
+        page_object.public_send("has_no_#{predicate}?", *args, **kwargs) # rubocop:disable GitlabSecurity/PublicSend
+      end
+    end
+  end
+end
diff --git a/qa/spec/support/matchers/have_package.rb b/qa/spec/support/matchers/have_package.rb
deleted file mode 100644
index 86e9bfee4d1..00000000000
--- a/qa/spec/support/matchers/have_package.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HavePackage
-    RSpec::Matchers.define :have_package do |package|
-      match do |page_object|
-        page_object.has_package?(package)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_package?(package)
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_pipeline.rb b/qa/spec/support/matchers/have_pipeline.rb
deleted file mode 100644
index 2bfd49d671a..00000000000
--- a/qa/spec/support/matchers/have_pipeline.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HavePipeline
-    RSpec::Matchers.define :have_pipeline do
-      match do |page_object|
-        page_object.has_pipeline?
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_pipeline?
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_related_issue_item.rb b/qa/spec/support/matchers/have_related_issue_item.rb
deleted file mode 100644
index 89403f2422a..00000000000
--- a/qa/spec/support/matchers/have_related_issue_item.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveRelatedIssueItem
-    RSpec::Matchers.define :have_related_issue_item do
-      match do |page_object|
-        page_object.has_related_issue_item?
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_related_issue_item?
-      end
-    end
-  end
-end
diff --git a/qa/spec/support/matchers/have_snippet_description.rb b/qa/spec/support/matchers/have_snippet_description.rb
deleted file mode 100644
index 7c407aefc83..00000000000
--- a/qa/spec/support/matchers/have_snippet_description.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-module Matchers
-  module HaveSnippetDescription
-    RSpec::Matchers.define :have_snippet_description do |description|
-      match do |page_object|
-        page_object.has_snippet_description?(description)
-      end
-
-      match_when_negated do |page_object|
-        page_object.has_no_snippet_description?
-      end
-    end
-  end
-end
diff --git a/spec/controllers/groups/dependency_proxy_for_containers_controller_spec.rb b/spec/controllers/groups/dependency_proxy_for_containers_controller_spec.rb
index 2056feb6434..39cbdfb9123 100644
--- a/spec/controllers/groups/dependency_proxy_for_containers_controller_spec.rb
+++ b/spec/controllers/groups/dependency_proxy_for_containers_controller_spec.rb
@@ -130,7 +130,7 @@ RSpec.describe Groups::DependencyProxyForContainersController do
           }
         end
 
-        it 'proxies status from the remote token request', :aggregate_failures do
+        it 'proxies status from the remote token request' do
           subject
 
           expect(response).to have_gitlab_http_status(:service_unavailable)
@@ -147,7 +147,7 @@ RSpec.describe Groups::DependencyProxyForContainersController do
           }
         end
 
-        it 'proxies status from the remote manifest request', :aggregate_failures do
+        it 'proxies status from the remote manifest request' do
           subject
 
           expect(response).to have_gitlab_http_status(:bad_request)
@@ -156,19 +156,15 @@ RSpec.describe Groups::DependencyProxyForContainersController do
       end
 
       it 'sends a file' do
-        expect(controller).to receive(:send_file).with(manifest.file.path, type: manifest.content_type)
+        expect(controller).to receive(:send_file).with(manifest.file.path, {})
 
         subject
       end
 
-      it 'returns Content-Disposition: attachment', :aggregate_failures do
+      it 'returns Content-Disposition: attachment' do
         subject
 
         expect(response).to have_gitlab_http_status(:ok)
-        expect(response.headers['Docker-Content-Digest']).to eq(manifest.digest)
-        expect(response.headers['Content-Length']).to eq(manifest.size)
-        expect(response.headers['Docker-Distribution-Api-Version']).to eq(DependencyProxy::DISTRIBUTION_API_VERSION)
-        expect(response.headers['Etag']).to eq("\"#{manifest.digest}\"")
         expect(response.headers['Content-Disposition']).to match(/^attachment/)
       end
     end
@@ -211,7 +207,7 @@ RSpec.describe Groups::DependencyProxyForContainersController do
           }
         end
 
-        it 'proxies status from the remote blob request', :aggregate_failures do
+        it 'proxies status from the remote blob request' do
           subject
 
           expect(response).to have_gitlab_http_status(:bad_request)
@@ -225,7 +221,7 @@ RSpec.describe Groups::DependencyProxyForContainersController do
         subject
       end
 
-      it 'returns Content-Disposition: attachment', :aggregate_failures do
+      it 'returns Content-Disposition: attachment' do
         subject
 
         expect(response).to have_gitlab_http_status(:ok)
diff --git a/spec/controllers/projects/jobs_controller_spec.rb b/spec/controllers/projects/jobs_controller_spec.rb
index 430808e1c63..80e1268cb01 100644
--- a/spec/controllers/projects/jobs_controller_spec.rb
+++ b/spec/controllers/projects/jobs_controller_spec.rb
@@ -15,54 +15,6 @@ RSpec.describe Projects::JobsController, :clean_gitlab_redis_shared_state do
   end
 
   describe 'GET index' do
-    describe 'pushing tracking_data to Gon' do
-      before do
-        stub_experiment(jobs_empty_state: experiment_active)
-        stub_experiment_for_subject(jobs_empty_state: in_experiment_group)
-
-        get_index
-      end
-
-      context 'when experiment not active' do
-        let(:experiment_active) { false }
-        let(:in_experiment_group) { false }
-
-        it 'does not push tracking_data to Gon' do
-          expect(Gon.tracking_data).to be_nil
-        end
-      end
-
-      context 'when experiment active and user in control group' do
-        let(:experiment_active) { true }
-        let(:in_experiment_group) { false }
-
-        it 'pushes tracking_data to Gon' do
-          expect(Gon.tracking_data).to match(
-            {
-              category: 'Growth::Activation::Experiment::JobsEmptyState',
-              action: 'click_button',
-              label: anything,
-              property: 'control_group'
-            }
-          )
-        end
-      end
-
-      context 'when experiment active and user in experimental group' do
-        let(:experiment_active) { true }
-        let(:in_experiment_group) { true }
-
-        it 'pushes tracking_data to gon' do
-          expect(Gon.tracking_data).to match(
-            category: 'Growth::Activation::Experiment::JobsEmptyState',
-            action: 'click_button',
-            label: anything,
-            property: 'experimental_group'
-          )
-        end
-      end
-    end
-
     context 'when scope is pending' do
       before do
         create(:ci_build, :pending, pipeline: pipeline)
diff --git a/spec/factories/dependency_proxy.rb b/spec/factories/dependency_proxy.rb
index 94a7986a8fa..de95df19876 100644
--- a/spec/factories/dependency_proxy.rb
+++ b/spec/factories/dependency_proxy.rb
@@ -10,8 +10,7 @@ FactoryBot.define do
   factory :dependency_proxy_manifest, class: 'DependencyProxy::Manifest' do
     group
     file { fixture_file_upload('spec/fixtures/dependency_proxy/manifest') }
-    digest { 'sha256:d0710affa17fad5f466a70159cc458227bd25d4afb39514ef662ead3e6c99515' }
+    digest { 'sha256:5ab5a6872b264fe4fd35d63991b9b7d8425f4bc79e7cf4d563c10956581170c9' }
     file_name { 'alpine:latest.json' }
-    content_type { 'application/vnd.docker.distribution.manifest.v2+json' }
   end
 end
diff --git a/spec/factories/packages.rb b/spec/factories/packages.rb
index ca38793ac08..158c5974c6a 100644
--- a/spec/factories/packages.rb
+++ b/spec/factories/packages.rb
@@ -29,6 +29,15 @@ FactoryBot.define do
       transient do
         without_package_files { false }
         file_metadatum_trait { :keep }
+        published_in { :create }
+      end
+
+      after :build do |package, evaluator|
+        if evaluator.published_in == :create
+          create(:debian_publication, package: package)
+        elsif !evaluator.published_in.nil?
+          create(:debian_publication, package: package, distribution: evaluator.published_in)
+        end
       end
 
       after :create do |package, evaluator|
@@ -50,6 +59,7 @@ FactoryBot.define do
         transient do
           without_package_files { false }
           file_metadatum_trait { :unknown }
+          published_in { nil }
         end
       end
     end
diff --git a/spec/factories/packages/debian/publication.rb b/spec/factories/packages/debian/publication.rb
new file mode 100644
index 00000000000..314c7064e9b
--- /dev/null
+++ b/spec/factories/packages/debian/publication.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :debian_publication, class: 'Packages::Debian::Publication' do
+    package { association(:debian_package, published_in: nil) }
+
+    distribution { association(:debian_project_distribution, project: package.project) }
+  end
+end
diff --git a/spec/features/projects/jobs_spec.rb b/spec/features/projects/jobs_spec.rb
index adf664f26af..7811394b541 100644
--- a/spec/features/projects/jobs_spec.rb
+++ b/spec/features/projects/jobs_spec.rb
@@ -27,40 +27,12 @@ RSpec.describe 'Jobs', :clean_gitlab_redis_shared_state do
   describe "GET /:project/jobs" do
     context 'with no jobs' do
       before do
-        stub_experiment(jobs_empty_state: experiment_active)
-        stub_experiment_for_subject(jobs_empty_state: in_experiment_group)
-
         visit project_jobs_path(project)
       end
 
-      context 'when experiment not active' do
-        let(:experiment_active) { false }
-        let(:in_experiment_group) { false }
-
-        it 'shows the empty state control page' do
-          expect(page).to have_content('No jobs to show')
-          expect(page).to have_link('Get started with Pipelines')
-        end
-      end
-
-      context 'when experiment active and user in control group' do
-        let(:experiment_active) { true }
-        let(:in_experiment_group) { false }
-
-        it 'shows the empty state control page' do
-          expect(page).to have_content('No jobs to show')
-          expect(page).to have_link('Get started with Pipelines')
-        end
-      end
-
-      context 'when experiment active and user in experimental group' do
-        let(:experiment_active) { true }
-        let(:in_experiment_group) { true }
-
-        it 'shows the empty state experiment page' do
-          expect(page).to have_content('Use jobs to automate your tasks')
-          expect(page).to have_link('Create CI/CD configuration file')
-        end
+      it 'shows the empty state page' do
+        expect(page).to have_content('Use jobs to automate your tasks')
+        expect(page).to have_link('Create CI/CD configuration file', href: project.present(current_user: user).add_ci_yml_path)
       end
     end
 
@@ -102,7 +74,7 @@ RSpec.describe 'Jobs', :clean_gitlab_redis_shared_state do
 
         it "shows Finished tab jobs" do
           expect(page).to have_selector('.nav-links li.active', text: 'Finished')
-          expect(page).to have_content 'No jobs to show'
+          expect(page).to have_content('Use jobs to automate your tasks')
         end
       end
 
diff --git a/spec/fixtures/dependency_proxy/manifest b/spec/fixtures/dependency_proxy/manifest
index ed543883d60..a899d05d697 100644
--- a/spec/fixtures/dependency_proxy/manifest
+++ b/spec/fixtures/dependency_proxy/manifest
@@ -1,16 +1,38 @@
 {
-   "schemaVersion": 2,
-   "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
-   "config": {
-      "mediaType": "application/vnd.docker.container.image.v1+json",
-      "size": 1472,
-      "digest": "sha256:7731472c3f2a25edbb9c085c78f42ec71259f2b83485aa60648276d408865839"
-   },
-   "layers": [
+   "schemaVersion": 1,
+   "name": "library/alpine",
+   "tag": "latest",
+   "architecture": "amd64",
+   "fsLayers": [
       {
-         "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
-         "size": 2810825,
-         "digest": "sha256:596ba82af5aaa3e2fd9d6f955b8b94f0744a2b60710e3c243ba3e4a467f051d1"
+         "blobSum": "sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4"
+      },
+      {
+         "blobSum": "sha256:188c0c94c7c576fff0792aca7ec73d67a2f7f4cb3a6e53a84559337260b36964"
+      }
+   ],
+   "history": [
+      {
+         "v1Compatibility": "{\"architecture\":\"amd64\",\"config\":{\"Hostname\":\"\",\"Domainname\":\"\",\"User\":\"\",\"AttachStdin\":false,\"AttachStdout\":false,\"AttachStderr\":false,\"Tty\":false,\"OpenStdin\":false,\"StdinOnce\":false,\"Env\":[\"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\"],\"Cmd\":[\"/bin/sh\"],\"ArgsEscaped\":true,\"Image\":\"sha256:3543079adc6fb5170279692361be8b24e89ef1809a374c1b4429e1d560d1459c\",\"Volumes\":null,\"WorkingDir\":\"\",\"Entrypoint\":null,\"OnBuild\":null,\"Labels\":null},\"container\":\"8c59eb170e19b8c3768b8d06c91053b0debf4a6fa6a452df394145fe9b885ea5\",\"container_config\":{\"Hostname\":\"8c59eb170e19\",\"Domainname\":\"\",\"User\":\"\",\"AttachStdin\":false,\"AttachStdout\":false,\"AttachStderr\":false,\"Tty\":false,\"OpenStdin\":false,\"StdinOnce\":false,\"Env\":[\"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\"],\"Cmd\":[\"/bin/sh\",\"-c\",\"#(nop) \",\"CMD [\\\"/bin/sh\\\"]\"],\"ArgsEscaped\":true,\"Image\":\"sha256:3543079adc6fb5170279692361be8b24e89ef1809a374c1b4429e1d560d1459c\",\"Volumes\":null,\"WorkingDir\":\"\",\"Entrypoint\":null,\"OnBuild\":null,\"Labels\":{}},\"created\":\"2020-10-22T02:19:24.499382102Z\",\"docker_version\":\"18.09.7\",\"id\":\"c5f1aab5bb88eaf1aa62bea08ea6654547d43fd4d15b1a476c77e705dd5385ba\",\"os\":\"linux\",\"parent\":\"dc0b50cc52bc340d7848a62cfe8a756f4420592f4984f7a680ef8f9d258176ed\",\"throwaway\":true}"
+      },
+      {
+         "v1Compatibility": "{\"id\":\"dc0b50cc52bc340d7848a62cfe8a756f4420592f4984f7a680ef8f9d258176ed\",\"created\":\"2020-10-22T02:19:24.33416307Z\",\"container_config\":{\"Cmd\":[\"/bin/sh -c #(nop) ADD file:f17f65714f703db9012f00e5ec98d0b2541ff6147c2633f7ab9ba659d0c507f4 in / \"]}}"
+      }
+   ],
+   "signatures": [
+      {
+         "header": {
+            "jwk": {
+               "crv": "P-256",
+               "kid": "XOTE:DZ4C:YBPJ:3O3L:YI4B:NYXU:T4VR:USH6:CXXN:SELU:CSCC:FVPE",
+               "kty": "EC",
+               "x": "cR1zye_3354mdbD7Dn-mtXNXvtPtmLlUVDa5vH6Lp74",
+               "y": "rldUXSllLit6_2BW6AV8aqkwWJXHoYPG9OwkIBouwxQ"
+            },
+            "alg": "ES256"
+         },
+         "signature": "DYB2iB-XKIisqp5Q0OXFOBIOlBOuRV7pnZuKy0cxVB2Qj1VFRhWX4Tq336y0VMWbF6ma1he5A1E_Vk4jazrJ9g",
+         "protected": "eyJmb3JtYXRMZW5ndGgiOjIxMzcsImZvcm1hdFRhaWwiOiJDbjAiLCJ0aW1lIjoiMjAyMC0xMS0yNFQyMjowMTo1MVoifQ"
       }
    ]
 }
\ No newline at end of file
diff --git a/spec/frontend/integrations/edit/components/jira_issues_fields_spec.js b/spec/frontend/integrations/edit/components/jira_issues_fields_spec.js
index b866cf8bc03..d6b53261172 100644
--- a/spec/frontend/integrations/edit/components/jira_issues_fields_spec.js
+++ b/spec/frontend/integrations/edit/components/jira_issues_fields_spec.js
@@ -126,6 +126,20 @@ describe('JiraIssuesFields', () => {
         },
       );
 
+      it('passes down the correct initial-issue-type-id value when value is empty', async () => {
+        await setEnableCheckbox(true);
+        expect(findJiraForVulnerabilities().attributes('initial-issue-type-id')).toBeUndefined();
+      });
+
+      it('passes down the correct initial-issue-type-id value when value is not empty', async () => {
+        const jiraIssueType = 'some-jira-issue-type';
+        wrapper.setProps({ initialVulnerabilitiesIssuetype: jiraIssueType });
+        await setEnableCheckbox(true);
+        expect(findJiraForVulnerabilities().attributes('initial-issue-type-id')).toBe(
+          jiraIssueType,
+        );
+      });
+
       it('emits "getJiraIssueTypes" to the eventHub when the jira-vulnerabilities component requests to fetch issue types', async () => {
         const eventHubEmitSpy = jest.spyOn(eventHub, '$emit');
 
diff --git a/spec/lib/gitlab/data_builder/pipeline_spec.rb b/spec/lib/gitlab/data_builder/pipeline_spec.rb
index 32619fc4c37..fd7cadeb89e 100644
--- a/spec/lib/gitlab/data_builder/pipeline_spec.rb
+++ b/spec/lib/gitlab/data_builder/pipeline_spec.rb
@@ -104,5 +104,16 @@ RSpec.describe Gitlab::DataBuilder::Pipeline do
         expect(merge_request_attrs[:url]).to eq("http://localhost/#{merge_request.target_project.full_path}/-/merge_requests/#{merge_request.iid}")
       end
     end
+
+    context 'when pipeline has retried builds' do
+      before do
+        create(:ci_build, :retried, pipeline: pipeline)
+      end
+
+      it 'does not contain retried builds in payload' do
+        expect(data[:builds].count).to eq(1)
+        expect(build_data[:id]).to eq(build.id)
+      end
+    end
   end
 end
diff --git a/spec/migrations/20210205174154_remove_bad_dependency_proxy_manifests_spec.rb b/spec/migrations/20210205174154_remove_bad_dependency_proxy_manifests_spec.rb
new file mode 100644
index 00000000000..7e351617ea3
--- /dev/null
+++ b/spec/migrations/20210205174154_remove_bad_dependency_proxy_manifests_spec.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20210205174154_remove_bad_dependency_proxy_manifests.rb')
+
+RSpec.describe RemoveBadDependencyProxyManifests, schema: 20210128140157 do
+  let_it_be(:namespaces) { table(:namespaces) }
+  let_it_be(:dependency_proxy_manifests) { table(:dependency_proxy_manifests) }
+  let_it_be(:group) { namespaces.create!(type: 'Group', name: 'test', path: 'test') }
+
+  let_it_be(:dependency_proxy_manifest_with_content_type) do
+    dependency_proxy_manifests.create!(group_id: group.id, file: 'foo', file_name: 'foo', digest: 'asdf1234', content_type: 'content-type' )
+  end
+
+  let_it_be(:dependency_proxy_manifest_without_content_type) do
+    dependency_proxy_manifests.create!(group_id: group.id, file: 'bar', file_name: 'bar', digest: 'fdsa6789')
+  end
+
+  it 'removes the dependency_proxy_manifests with a content_type', :aggregate_failures do
+    expect(dependency_proxy_manifest_with_content_type).to be_present
+    expect(dependency_proxy_manifest_without_content_type).to be_present
+
+    expect { migrate! }.to change { dependency_proxy_manifests.count }.from(2).to(1)
+
+    expect(dependency_proxy_manifests.where.not(content_type: nil)).to be_empty
+    expect(dependency_proxy_manifest_without_content_type.reload).to be_present
+  end
+end
diff --git a/spec/models/dependency_proxy/manifest_spec.rb b/spec/models/dependency_proxy/manifest_spec.rb
index 4203644c003..aa2e73356dd 100644
--- a/spec/models/dependency_proxy/manifest_spec.rb
+++ b/spec/models/dependency_proxy/manifest_spec.rb
@@ -29,32 +29,24 @@ RSpec.describe DependencyProxy::Manifest, type: :model do
     end
   end
 
-  describe '.find_or_initialize_by_file_name_or_digest' do
-    let_it_be(:file_name) { 'foo' }
-    let_it_be(:digest) { 'bar' }
-
-    subject { DependencyProxy::Manifest.find_or_initialize_by_file_name_or_digest(file_name: file_name, digest: digest) }
+  describe '.find_or_initialize_by_file_name' do
+    subject { DependencyProxy::Manifest.find_or_initialize_by_file_name(file_name) }
 
     context 'no manifest exists' do
+      let_it_be(:file_name) { 'foo' }
+
       it 'initializes a manifest' do
-        expect(DependencyProxy::Manifest).to receive(:new).with(file_name: file_name, digest: digest)
+        expect(DependencyProxy::Manifest).to receive(:new).with(file_name: file_name)
 
         subject
       end
     end
 
-    context 'manifest exists and matches file_name' do
+    context 'manifest exists' do
       let_it_be(:dependency_proxy_manifest) { create(:dependency_proxy_manifest) }
       let_it_be(:file_name) { dependency_proxy_manifest.file_name }
 
       it { is_expected.to eq(dependency_proxy_manifest) }
     end
-
-    context 'manifest exists and matches digest' do
-      let_it_be(:dependency_proxy_manifest) { create(:dependency_proxy_manifest) }
-      let_it_be(:digest) { dependency_proxy_manifest.digest }
-
-      it { is_expected.to eq(dependency_proxy_manifest) }
-    end
   end
 end
diff --git a/spec/models/packages/debian/publication_spec.rb b/spec/models/packages/debian/publication_spec.rb
new file mode 100644
index 00000000000..0ed056f499b
--- /dev/null
+++ b/spec/models/packages/debian/publication_spec.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Packages::Debian::Publication, type: :model do
+  let_it_be_with_reload(:publication) { create(:debian_publication) }
+
+  subject { publication }
+
+  describe 'relationships' do
+    it { is_expected.to belong_to(:package).inverse_of(:debian_publication).class_name('Packages::Package') }
+    it { is_expected.to belong_to(:distribution).inverse_of(:publications).class_name('Packages::Debian::ProjectDistribution').with_foreign_key(:distribution_id) }
+  end
+
+  describe 'validations' do
+    describe '#package' do
+      it { is_expected.to validate_presence_of(:package) }
+    end
+
+    describe '#valid_debian_package_type' do
+      context 'with package type not being Debian' do
+        before do
+          publication.package.package_type = 'generic'
+        end
+
+        it 'will not allow package type not being Debian' do
+          expect(publication).not_to be_valid
+          expect(publication.errors.to_a).to eq(['Package type must be Debian'])
+        end
+      end
+
+      context 'with package not being a Debian package' do
+        before do
+          publication.package.version = nil
+        end
+
+        it 'will not allow package not being a distribution' do
+          expect(publication).not_to be_valid
+          expect(publication.errors.to_a).to eq(['Package must be a Debian package'])
+        end
+      end
+    end
+
+    describe '#distribution' do
+      it { is_expected.to validate_presence_of(:distribution) }
+    end
+  end
+end
diff --git a/spec/models/packages/package_spec.rb b/spec/models/packages/package_spec.rb
index 6645db33503..b5ff417e610 100644
--- a/spec/models/packages/package_spec.rb
+++ b/spec/models/packages/package_spec.rb
@@ -14,6 +14,8 @@ RSpec.describe Packages::Package, type: :model do
     it { is_expected.to have_many(:pipelines).through(:build_infos) }
     it { is_expected.to have_one(:conan_metadatum).inverse_of(:package) }
     it { is_expected.to have_one(:maven_metadatum).inverse_of(:package) }
+    it { is_expected.to have_one(:debian_publication).inverse_of(:package).class_name('Packages::Debian::Publication') }
+    it { is_expected.to have_one(:debian_distribution).through(:debian_publication).source(:distribution).inverse_of(:packages).class_name('Packages::Debian::ProjectDistribution') }
     it { is_expected.to have_one(:nuget_metadatum).inverse_of(:package) }
   end
 
@@ -374,7 +376,28 @@ RSpec.describe Packages::Package, type: :model do
       end
     end
 
-    Packages::Package.package_types.keys.without('conan').each do |pt|
+    describe "#unique_debian_package_name" do
+      let!(:package) { create(:debian_package) }
+
+      it "will allow a Debian package with same project, name and version, but different distribution" do
+        new_package = build(:debian_package, project: package.project, name: package.name, version: package.version)
+        expect(new_package).to be_valid
+      end
+
+      it "will not allow a Debian package with same project, name, version and distribution" do
+        new_package = build(:debian_package, project: package.project, name: package.name, version: package.version)
+        new_package.debian_publication.distribution = package.debian_publication.distribution
+        expect(new_package).not_to be_valid
+        expect(new_package.errors.to_a).to include('Debian package already exists in Distribution')
+      end
+
+      it "will allow a Debian package with same project, name, version, but no distribution" do
+        new_package = build(:debian_package, project: package.project, name: package.name, version: package.version, published_in: nil)
+        expect(new_package).to be_valid
+      end
+    end
+
+    Packages::Package.package_types.keys.without('conan', 'debian').each do |pt|
       context "project id, name, version and package type uniqueness for package type #{pt}" do
         let(:package) { create("#{pt}_package") }
 
diff --git a/spec/services/dependency_proxy/find_or_create_manifest_service_spec.rb b/spec/services/dependency_proxy/find_or_create_manifest_service_spec.rb
index 40a2f954786..c375e5a2fa3 100644
--- a/spec/services/dependency_proxy/find_or_create_manifest_service_spec.rb
+++ b/spec/services/dependency_proxy/find_or_create_manifest_service_spec.rb
@@ -10,12 +10,7 @@ RSpec.describe DependencyProxy::FindOrCreateManifestService do
   let(:manifest) { dependency_proxy_manifest.file.read }
   let(:group) { dependency_proxy_manifest.group }
   let(:token) { Digest::SHA256.hexdigest('123') }
-  let(:headers) do
-    {
-      'docker-content-digest' => dependency_proxy_manifest.digest,
-      'content-type' => dependency_proxy_manifest.content_type
-    }
-  end
+  let(:headers) { { 'docker-content-digest' => dependency_proxy_manifest.digest } }
 
   describe '#execute' do
     subject { described_class.new(group, image, tag, token).execute }
@@ -23,37 +18,22 @@ RSpec.describe DependencyProxy::FindOrCreateManifestService do
     context 'when no manifest exists' do
       let_it_be(:image) { 'new-image' }
 
-      shared_examples 'downloading the manifest' do
-        it 'downloads manifest from remote registry if there is no cached one', :aggregate_failures do
-          expect { subject }.to change { group.dependency_proxy_manifests.count }.by(1)
-          expect(subject[:status]).to eq(:success)
-          expect(subject[:manifest]).to be_a(DependencyProxy::Manifest)
-          expect(subject[:manifest]).to be_persisted
-        end
+      before do
+        stub_manifest_head(image, tag, digest: dependency_proxy_manifest.digest)
+        stub_manifest_download(image, tag, headers: headers)
       end
 
-      context 'successful head request' do
-        before do
-          stub_manifest_head(image, tag, headers: headers)
-          stub_manifest_download(image, tag, headers: headers)
-        end
-
-        it_behaves_like 'downloading the manifest'
-      end
-
-      context 'failed head request' do
-        before do
-          stub_manifest_head(image, tag, status: :error)
-          stub_manifest_download(image, tag, headers: headers)
-        end
-
-        it_behaves_like 'downloading the manifest'
+      it 'downloads manifest from remote registry if there is no cached one', :aggregate_failures do
+        expect { subject }.to change { group.dependency_proxy_manifests.count }.by(1)
+        expect(subject[:status]).to eq(:success)
+        expect(subject[:manifest]).to be_a(DependencyProxy::Manifest)
+        expect(subject[:manifest]).to be_persisted
       end
     end
 
     context 'when manifest exists' do
       before do
-        stub_manifest_head(image, tag, headers: headers)
+        stub_manifest_head(image, tag, digest: dependency_proxy_manifest.digest)
       end
 
       shared_examples 'using the cached manifest' do
@@ -68,17 +48,15 @@ RSpec.describe DependencyProxy::FindOrCreateManifestService do
 
       context 'when digest is stale' do
         let(:digest) { 'new-digest' }
-        let(:content_type) { 'new-content-type' }
 
         before do
-          stub_manifest_head(image, tag, headers: { 'docker-content-digest' => digest, 'content-type' => content_type })
-          stub_manifest_download(image, tag, headers: { 'docker-content-digest' => digest, 'content-type' => content_type })
+          stub_manifest_head(image, tag, digest: digest)
+          stub_manifest_download(image, tag, headers: { 'docker-content-digest' => digest })
         end
 
         it 'downloads the new manifest and updates the existing record', :aggregate_failures do
           expect(subject[:status]).to eq(:success)
           expect(subject[:manifest]).to eq(dependency_proxy_manifest)
-          expect(subject[:manifest].content_type).to eq(content_type)
           expect(subject[:manifest].digest).to eq(digest)
         end
       end
diff --git a/spec/services/dependency_proxy/head_manifest_service_spec.rb b/spec/services/dependency_proxy/head_manifest_service_spec.rb
index 9c1e4d650f8..7c7ebe4d181 100644
--- a/spec/services/dependency_proxy/head_manifest_service_spec.rb
+++ b/spec/services/dependency_proxy/head_manifest_service_spec.rb
@@ -8,19 +8,12 @@ RSpec.describe DependencyProxy::HeadManifestService do
   let(:tag) { 'latest' }
   let(:token) { Digest::SHA256.hexdigest('123') }
   let(:digest) { '12345' }
-  let(:content_type) { 'foo' }
-  let(:headers) do
-    {
-      'docker-content-digest' => digest,
-      'content-type' => content_type
-    }
-  end
 
   subject { described_class.new(image, tag, token).execute }
 
   context 'remote request is successful' do
     before do
-      stub_manifest_head(image, tag, headers: headers)
+      stub_manifest_head(image, tag, digest: digest)
     end
 
     it { expect(subject[:status]).to eq(:success) }
diff --git a/spec/services/dependency_proxy/pull_manifest_service_spec.rb b/spec/services/dependency_proxy/pull_manifest_service_spec.rb
index b3053174cc0..b760839d1fb 100644
--- a/spec/services/dependency_proxy/pull_manifest_service_spec.rb
+++ b/spec/services/dependency_proxy/pull_manifest_service_spec.rb
@@ -9,10 +9,7 @@ RSpec.describe DependencyProxy::PullManifestService do
   let(:token) { Digest::SHA256.hexdigest('123') }
   let(:manifest) { { foo: 'bar' }.to_json }
   let(:digest) { '12345' }
-  let(:content_type) { 'foo' }
-  let(:headers) do
-    { 'docker-content-digest' => digest, 'content-type' => content_type }
-  end
+  let(:headers) { { 'docker-content-digest' => digest } }
 
   subject { described_class.new(image, tag, token).execute_with_manifest(&method(:check_response)) }
 
@@ -28,7 +25,6 @@ RSpec.describe DependencyProxy::PullManifestService do
         expect(response[:status]).to eq(:success)
         expect(response[:file].read).to eq(manifest)
         expect(response[:digest]).to eq(digest)
-        expect(response[:content_type]).to eq(content_type)
       end
 
       subject
diff --git a/spec/support/helpers/dependency_proxy_helpers.rb b/spec/support/helpers/dependency_proxy_helpers.rb
index 0d8f56906e3..ebb849628bf 100644
--- a/spec/support/helpers/dependency_proxy_helpers.rb
+++ b/spec/support/helpers/dependency_proxy_helpers.rb
@@ -18,11 +18,11 @@ module DependencyProxyHelpers
       .to_return(status: status, body: body || manifest, headers: headers)
   end
 
-  def stub_manifest_head(image, tag, status: 200, body: nil, headers: {})
+  def stub_manifest_head(image, tag, status: 200, body: nil, digest: '123456')
     manifest_url = registry.manifest_url(image, tag)
 
     stub_full_request(manifest_url, method: :head)
-      .to_return(status: status, body: body, headers: headers )
+      .to_return(status: status, body: body, headers: { 'docker-content-digest' => digest } )
   end
 
   def stub_blob_download(image, blob_sha, status = 200, body = '123456')
diff --git a/spec/support/shared_examples/models/packages/debian/distribution_shared_examples.rb b/spec/support/shared_examples/models/packages/debian/distribution_shared_examples.rb
index 0587ad4c51c..b4ec146df14 100644
--- a/spec/support/shared_examples/models/packages/debian/distribution_shared_examples.rb
+++ b/spec/support/shared_examples/models/packages/debian/distribution_shared_examples.rb
@@ -19,6 +19,11 @@ RSpec.shared_examples 'Debian Distribution' do |factory, container, can_freeze|
 
     it { is_expected.to have_many(:components).class_name("Packages::Debian::#{container.capitalize}Component").inverse_of(:distribution) }
     it { is_expected.to have_many(:architectures).class_name("Packages::Debian::#{container.capitalize}Architecture").inverse_of(:distribution) }
+
+    if container != :group
+      it { is_expected.to have_many(:publications).class_name('Packages::Debian::Publication').inverse_of(:distribution).with_foreign_key(:distribution_id) }
+      it { is_expected.to have_many(:packages).class_name('Packages::Package').through(:publications) }
+    end
   end
 
   describe 'validations' do