add report failed build job (#69)

Signed-off-by: Jade Carino <[email protected]>

.github/workflows/build.yaml

@@ -261,4 +261,16 @@ jobs:
           push: true
           tags: ${{ steps.metadata.outputs.tags }}
           labels: ${{ steps.metadata.outputs.labels }}
-
+
+  report-failure:
+    name: Report failure in workflow
+    runs-on: ubuntu-latest
+    needs: [build-push-galasabld, build-push-galasabld-ibm, build-push-openapi2beans, build-push-buildutils-executables]
+    if: failure()
+
+    steps:
+      - name: Report failure in workflow to Slack
+        env: 
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+        run : |
+          docker run --rm -v ${{ github.workspace }}:/var/workspace ghcr.io/galasa-dev/galasabld-ibm:main slackpost workflows --repo "buildutils" --workflowName "${{ github.workflow }}" --workflowRunNum "${{ github.run_id }}" --ref "${{ env.BRANCH }}" --hook "${{ env.SLACK_WEBHOOK }}"