added Slack notification

.github/workflows/ci.yaml

@@ -512,3 +512,13 @@ jobs:
 
       - name: upload-dumps-for-downstream
         run: ./scripts/ci/jobs/upload-dumps-for-embedding.sh
+
+  send-notification:
+    needs:
+      - diff-dumps
+    runs-on: ubuntu-latest
+    if: failure()
+    steps:
+      - name: Send Slack notification on workflow failure
+        run: |
+          curl -X POST -H 'Content-type: application/json' --data '{"text":"<${{github.server_url}}/${{github.repository}}/actions/runs/${{github.run_id}}|Workflow ${{ github.workflow }}> failed in repository ${{ github.repository }}: Failed to update offline vulnerabilities"}' ${{ secrets.SLACK_ONCALL_SCANNER_WEBHOOK }}

scripts/ci/jobs/diff-dumps.sh

@@ -107,6 +107,7 @@ upload_offline_dump() {
         echo "$file_to_check added to scanner-vuln-updates.zip"
     else
         echo "$file_to_check does not exist."
+        exit 1
     fi
     "${cmd[@]}" gsutil cp scanner-vuln-updates.zip gs://scanner-support-public/offline/v1/scanner-vuln-updates.zip
 }