feat: slack notification format, content

.github/workflows/publish-dev-docker.yml

@@ -100,3 +100,18 @@ jobs:
           tags: supertokens/supertokens-dev-${{ matrix.plugin }}:${{ steps.set_tag.outputs.TAG }}
           file: ./supertokens-root/supertokens-${{ matrix.plugin }}-plugin/.github/helpers/docker/Dockerfile
           platforms: linux/amd64,linux/arm64
+      - name: Post notification on Slack channel
+        uses: slackapi/slack-github-action@v2.1.0
+        with:
+          method: chat.postMessage
+          token: ${{ secrets.SLACK_BOT_TOKEN }}
+          payload: |
+            channel: ${{ secrets.SLACK_CHANNEL_ID }}
+            blocks:
+              - type: "section"
+                text:
+                  type: "mrkdwn"
+                  text: "${{ github.workflow.name }} - tag: ${{ steps.set_tag.outputs.TAG }} result: *${{ job.status 
+            }}*\n${{ 
+            github.event.pull_request.html_url || 
+            github.event.head_commit.url }}"