feat: add verification step for build contents before uploading artifacts

Author: rminchev1

.github/workflows/deploy.yml

@@ -28,6 +28,9 @@ jobs:
       - name: Build Astro Starlight project
         run: npm run build
 
+      - name: Verify build contents
+        run: ls -R ./dist
+
       - name: Upload build artifacts
         uses: actions/upload-pages-artifact@v3
         with: