ci: add slack notification to notify about failing infra setup (#3)

Author: HarshCasper

.github/workflows/main.yml

@@ -9,9 +9,13 @@ on:
   pull_request:
     branches:
       - main
+  schedule:
+    # “At 00:00 on Sunday.”
+    - cron: "0 0 * * 0"
+  workflow_dispatch:
 
 jobs:
-  terraform:
+  cdk:
     name: Setup infrastructure using CDK
     runs-on: ubuntu-latest
     steps:
@@ -63,3 +67,28 @@ jobs:
           retry_wait_seconds: 10
           command: |
             yarn cdklocal deploy
+
+      - name: Send a Slack notification
+        if: failure() || github.event_name != 'pull_request'
+        uses: ravsamhq/notify-slack-action@v2
+        with:
+          status: ${{ job.status }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          notification_title: "{workflow} has {status_message}"
+          message_format: "{emoji} *{workflow}* {status_message} in <{repo_url}|{repo}>"
+          footer: "Linked Repo <{repo_url}|{repo}> | <{run_url}|View Workflow run>"
+          notify_when: "failure"
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+
+      - name: Generate a Diagnostic Report
+        if: failure()
+        run: |
+          curl -s localhost:4566/_localstack/diagnose | gzip -cf > diagnose.json.gz
+
+      - name: Upload the Diagnostic Report
+        if: failure()
+        uses: actions/upload-artifact@v3
+        with:
+          name: diagnose.json.gz
+          path: ./diagnose.json.gz