actions: alert on deployment failure (#341)

Signed-off-by: flakey5 <[email protected]>

Author: flakey5

.github/workflows/deploy.yml

@@ -42,4 +42,19 @@ jobs:
         with:
           apiToken: ${{ secrets.CF_API_TOKEN }}
           command: deploy --env prod
+
+      - name: Alert on Failure
+        if: failure() && github.repository == 'nodejs/release-cloudflare-worker'
+        runs-on: ubuntu-latest
+        steps:
+          - name: Slack Notification
+            uses: rtCamp/action-slack-notify@c33737706dea87cd7784c687dadc9adf1be59990 # 2.3.2
+            env:
+              SLACK_COLOR: '#DE512A'
+              SLACK_ICON: https://github.com/nodejs.png?size=48
+              SLACK_TITLE: Deployment failed (${{ github.ref }})
+              SLACK_MESSAGE: |
+                A deployment of the Release Worker has failed.
+              SLACK_USERNAME: nodejs-bot
+              SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}