app folder referenced in Dockerfile of 5.0.0a1 not created

[JamesOHeaDLS]

I am using python-copier-template 5.0.0a1 with fastcs-goniowl (https://github.com/DiamondLightSource/fastcs-goniowl)

When the GitHub CI runs, the container / build step fails (https://github.com/DiamondLightSource/fastcs-goniowl/actions/runs/18122507210) with the following error:

Run docker run --rm tag_for_testing --version
  docker run --rm tag_for_testing --version
  shell: /usr/bin/bash -e {0}
exec /app/.venv/bin/fastcs-goniowl: no such file or directory
Error: Process completed with exit code 255.

In the repo .venv/bin/fastcs-goniowl is there, but the app folder is not

Looking in the Dockerfile the /app folder is referenced but not created

WORKDIR /app
COPY . /app
RUN chmod o+wrX .