Update build.yml

Author: jgebal

.github/workflows/build.yml

@@ -77,3 +77,19 @@ jobs:
         if: always()
         with:
           files: target/**/TEST**.xml
+
+  slack-workflow-status:
+    if: always()
+    name: Post Workflow Status To Slack
+    needs: [ build ]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Slack Workflow Notification
+        uses: Gamesight/slack-workflow-status@master
+        with:
+          # Required Input
+          repo_token: ${{secrets.GITHUB_TOKEN}}
+          slack_webhook_url: ${{secrets.SLACK_WEBHOOK_URL}}
+          # Optional Input
+          name: 'Github Actions[bot]'
+          icon_url: 'https://octodex.github.com/images/mona-the-rivetertocat.png'