Notify slack of test failures on main (wpengine#9)

* Break the build

* Notify slack on failure

* Update notification channel name

* Use channel_id to avoid rate limit issue

* Make sure job can be cancelled

* Revert "Break the build"

This reverts commit 595ceb9.

* Only notify on `main` failures

.github/workflows/e2e-deploy.yml

@@ -35,18 +35,19 @@ jobs:
           CACHE_CLEAR: true
   validate_result:
     runs-on: ubuntu-latest
-    if: ${{ always() }}
+    if: ${{ !cancelled() }}
     needs: run_action
     steps:
       - name: Validate deploy results
         run: |
           [ ${{needs.run_action.outputs.status}} = "pass" ] || exit 1
-      # - name: Notify slack on failure
-      #   if: failure() && github.ref == 'refs/heads/main'
-      #   env:
-      #     SLACK_BOT_TOKEN: ${{ secrets.SLACK_NOTIFICATIONS_BOT_TOKEN }}
-      #   uses: voxmedia/github-action-slack-notify-build@v1
-      #   with:
-      #     channel: status-github-action
-      #     status: FAILED
-      #     color: danger
+      - name: Notify slack on failure
+        if: failure() && github.ref == 'refs/heads/main'
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_NOTIFICATIONS_BOT_TOKEN }}
+        uses: voxmedia/github-action-slack-notify-build@v1
+        with:
+          # Channel: status-site-deploy
+          channel_id: C04ELD8NMT4
+          status: FAILED
+          color: danger