gitlab-ce/app/validators/json_schemas/application_setting_pages.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "description": "Pages settings",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "pages_extra_deployments_default_expiry_seconds": {
      "type": "integer",
      "minimum": 0,
      "description": "Default expiration for extra deployments in seconds."
    }
  }
}