Fix template-only-app install in CI

Author: doshitan

.github/workflows/template-only-ci-infra.yml

@@ -81,7 +81,7 @@ jobs:
 
       - name: Install example app for infra tests
         run: |
-          mv -vf ./project-dir/template-only-app ./project-dir/app
+          cp -vfr ./project-dir/template-only-app/* ./project-dir/app
 
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4