add a comment containing additional deployment information

.gitea/workflows/backend_build-deploy-prod.yaml

@@ -3,6 +3,9 @@ on:
     tags:
       - v*
 
+permissions:
+  pull-requests: write
+
 name: Build and deploy the backend to production
 
 jobs:
@@ -14,3 +17,18 @@ jobs:
       tag: ${{ github.ref_name }}
     secrets:
       PACKAGE_REGISTRY_ACCESS: ${{ secrets.PACKAGE_REGISTRY_ACCESS }}
+
+
+  notify:
+    runs-on: ubuntu-latest
+    name: Add a comment to the PR to notify about the deployment
+    steps:
+      - name: Notify about deployment
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          header: backend deployed to production
+          message: |
+            The backend has been deployed to staging with url <https://pr-{{ github.event.number }}.anyway-stg.anydev.info>. Check the deployment status in ArgoCD:
+
+            [![App Status](https://argocd.kluster.moll.re/api/badge?name=anydev-anyway-backend-stg-pr-{{ github.event.number }}&revision=true&showAppName=true)](https://argocd.kluster.moll.re/applications/anydev-anyway-backend-stg-pr-{{ github.event.number }})