The requirement of managing an LDAP or AD directory service just to get some auth for NFS is a dealbreaker for like 99% of people. It’s such a dumb protocol for the average user and was designed with only huge corporate clients in mind.

Just give people a simple password auth or let them exchange private/public keys between the devices that need to connect!

Also, if you want to actually learn, I would strongly recommend against using Docker containers for everything. Besides being stuck with what the developers prefer, all the work of installing things is already done.

I really disagree on this point. You should use docker or podman (preferably Podman) to containerize your applications on your server to keep them ephemeral and separated from the host OS wherever possible. This improves security, makes setups reproducible, and eases backup and restore procedure. If you want to build from source do so with a containerfile/docker file to keep your build environment fresh and clean.