[feature] slack 메시지 전송 임시 구현

.github/workflows/code_test_pipeline.yaml

@@ -73,3 +73,20 @@ jobs:
         if: always()
         with:
           files: "**/build/test-results/test/TEST-*.xml"
+
+  report-to-slack:
+    runs-on: ubuntu-latest
+    needs: [ unit-test ]
+    steps:
+      - name: Report to Slack Channel
+        uses: slackapi/slack-github-action@v2.0.0
+        with:
+          webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
+          webhook-type: incoming-webhook
+          payload: |
+            text: "*GitHub Action build result*: ${{ job.status }}\n${{ github.event.pull_request.html_url || github.event.head_commit.url }}"
+            blocks:
+              - type: "section"
+                text:
+                  type: "mrkdwn"
+                  text: "GitHub Action build result: ${{ job.status }}\n${{ github.event.pull_request.html_url || github.event.head_commit.url }}"