Add troubleshooting output to pr-docs-check-container-raw.

Author: samsrabin

.github/workflows/pr-docs-check-container-raw.yml

@@ -8,5 +8,7 @@ jobs:
     container:
       image: escomp/base:latest
     steps:
+    - run: pwd
+    - run: ls -lh
     - run: git lfs pull --exclude='' --include=''
     - run: sphinx-build -W --keep-going -n -b html . _build