It can be done via docker, on cli, though it is not the best of solutions. Due to conflicts between kernel 5.9.0 and Nvidia's drivers that ship with the current version of Anglefish, you will need to manually change APT's sources.list to include Debian's experimental and testing repos.. Then install 455+ drivers. You then have to install the nvidia docker container runtime.. Modify a file to make the container runtime work correctly.. And finally build the container. There is a writeup over on
reddit. Look down in the comments for updated instruction on getting this to work.
Until a kernel update is released, or SCALE ships with a newer Nvidia driver set, this process is fairly involved.. But it does work. I have my plex server running in a docker container, utilizing a Nvidia quadro p400 for transcoding, and have taken the workload off of my CPU. Do also keep in mind that you MUST have plexpass to enable hardware transcoding. No way around that one.