- Set HOME in bctx.EnvVars when USER switches so ~ expands correctly in
subsequent RUN/WORKDIR steps instead of resolving to /root
- Run /bin/sync inside the guest before FlattenRootfs destroys the VM,
preventing pip-installed files from being captured as 0-byte due to
unflushed page cache
- Wrap healthcheck command with su <user> so it runs with the template's
default user context (correct HOME, correct UID)
- Export Shellescape from the recipe package for use in build service
- Add code-runner-beta recipe (Jupyter server with ipykernel --sys-prefix)
and replace old python-interpreter-v0-beta
