Hotpotato CLI command requires a pipenv environment
To use the hotpotato command inside the hotpotato-dev container you must have installed the pipenv environment outside of the container.
This is because the container mounts the code directory as a volume and the hotpotato.egg-info subdirectory is needed for the entrypoint to be found.
Workaround is to install the pipenv environment, but ideally the container should be configured so that this isn't required.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information