Add failure notification

Author: stefan-burke

.github/workflows/build-and-deploy.yml

@@ -139,3 +139,15 @@ jobs:
           enable-purge-pull-zone: true
           pull-zone-id: "4574563"
           replication-timeout: "15000"
+
+  notify-failure:
+    name: Notify on Failure
+    runs-on: ubuntu-latest
+    needs: [setup, build, deploy]
+    if: failure()
+    steps:
+      - name: Send failure notification
+        uses: NiNiyas/ntfy-action@master
+        with:
+          url: 'https://ntfy.sh'
+          topic: ${{ secrets.NTFY_TOPIC }}