Post to slack only on run failure.

Author: purple4reina

.github/workflows/serverless-vuln-scan.yml

@@ -4,14 +4,20 @@ on:
   schedule:
     # daily at midnight
     - cron: "0 0 * * *"
+  pull_request:
 
 env:
   VERSION: 1  # env var required when building extension
 
 jobs:
-  run:
+  check:
     runs-on: ubuntu-latest
     steps:
+      - name: Fails
+        run: |
+          set -e
+          false
+
       - name: Checkout datadog-agent repository
         uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
         with:
@@ -108,3 +114,18 @@ jobs:
           fail-build: true
           severity-cutoff: low
           output-format: table
+
+  notify:
+    needs: check
+    if: failure()
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify
+        env:
+          SLACK_CHANNEL: "#serverless"
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+        run: |
+          set -x
+          curl -H "Content-type: application/json" -X POST "$SLACK_WEBHOOK" -d '{
+            "text": "this message from rey is just a test!"
+          }'