add a debug step to see file system files

Author: Tom McLaughlin

.github/workflows/branch.yaml

@@ -104,6 +104,11 @@ jobs:
       - name: Setup Python
         uses: ServerlessOpsIO/gha-setup-python@v1
 
+      - name: 'DEBUG: show files'
+        run: |
+          echo "Files in workspace:"
+          tree -a ./
+
 #      - name: Assume AWS Credentials
 #        uses: ServerlessOpsIO/gha-assume-aws-credentials@v1
 #        with: