* Create top level directories /.local /.config /.cache /.jupyter /work
that are writeable by all users and make /usr/local/venv writable to
allow for interactive use by non-root users.
* Set WORKDIR to be all user writable /work directory.
* Make 'build' nox session build the image for three common nvidia/cuda base images:
nvidia/cuda:11.2.2-devel-ubuntu20.04, nvidia/cuda:11.6.0-cudnn8-devel-ubuntu20.04,
nvidia/cuda:11.8.0-cudnn8-devel-ubuntu22.04. Set the 11.6.0-cudnn8-devel-ubuntu20.04
base image to be the default that 'latest-jax' is built against.