partial GPU support in node container
please do not delete the branch after merging
Partial implementation of #236 (closed) (GPU support in node container, for VPN/container env).
Included:
- updated first version of documentation (
${FEDBIOMED_DIR}/envs/vpn/README_tempo.md
) - tested for Fedora 35
- tested for image save/load
Not included in this version:
- test for Ubuntu (syntax ok, but need test on a machine with a GPU)
- test for Windows
- final documentation (gitlabpages), to be done with #138 (closed) (because it will change commands/syntax)