Update asset copying in deploy workflow

Change cp command to use -r flag for recursive copy and add ls command for verification.

Author: ph-value

.github/workflows/deploy.yml

@@ -27,8 +27,9 @@ jobs:
 
       - name: Copy posts to build/web/assets
         run: |
-          mkdir -p build/web/assets/post
-          cp -a post/. build/web/assets/post/
+              mkdir -p build/web/assets/post
+              cp -r post/. build/web/assets/post/
+              ls -al build/web/assets/post || true
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v3