Create workflow

.github/workflows/github-actions-demo.yml

@@ -0,0 +1,18 @@
+name: GitHub Actions Demo
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  demo:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fetch Comment
+        run: echo "comment=${{ github.event.comment.body }}" >> $GITHUB_ENV
+
+      - name: Echo Comment
+        run: |
+          echo "Comment: $comment"
+        env:
+          comment: ${{ env.comment }}