[TTAHUB-2749] Add github-slack workflow for production PR notifications

.circleci/config.yml

@@ -91,6 +91,20 @@ commands:
                 \"description\": \"<< parameters.env_name >> Successfully Deployed\"
               }
             }"
+  notify_slack:
+    description: "Notify slack of a deploy to production"
+    parameters:
+      slack_webhook_url:
+        description: "Slack webhook url"
+        type: string
+    steps:
+    - run:
+        name: Notify Slack of Deployment
+        command: |
+          curl -X POST -H 'Content-type: application/json' \
+          --data '{"text":"🚀 Deployment to production was successful!"}' \
+          << parameters.slack_webhook_url >>
+
   cf_deploy:
     description: "Login to cloud foundry space with service account credentials
       and push application using deployment configuration file."
@@ -856,6 +870,8 @@ jobs:
                 env_name: prod
                 new_relic_app_id: << pipeline.parameters.prod_new_relic_app_id >>
                 new_relic_api_key: $NEW_RELIC_REST_API_KEY
+            - notify_slack:
+                slack_webhook_url: $SLACK_WEBHOOK_URL
     resource_class: large
 workflows:
   build_test_deploy:

.github/workflows/pr-notifications.yml

@@ -0,0 +1,17 @@
+name: Pull Request Notifications
+
+on:
+  pull_request:
+    branches:
+      - production
+    types: [ready_for_review]
+
+jobs:
+  notify_slack:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Notify slack when a PR to production is opened
+      env:
+        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+      run: |
+        curl -X POST -H 'Content-type: application/json' --data "{\"text\": \":rocket: A pull request (#${{ github.event.pull_request.number }}) to *production* is now open! ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/pull/${{ github.event.pull_request.number }}\"}" $SLACK_WEBHOOK_URL