Docker image only works if run with root user

[Mithrillion]

It appears there are some issues with the user group setup for the image. When run with --user root the image is able to load, however without it the image crashes out with a message "no cuda gpus are available", and if trying to run nvidia-smi in the image, it results in Failed to initialize NVML: Insufficient Permissions.

I attempted to add the user to the video group with RUN usermod -a -G video user, but this does not work.

I think USER root should be able to fix the issue if only for local use.