Setting it up in docker wouldn’t be much different that setting it up on a baremetal.
Actually, I’d say the docker version is slightly more complicated.
https://hub.docker.com/r/linuxserver/wireguard
Instead of just making a wg conf, you have to also compose a docker run command (not docker-compose). I don’t understand the final docker command part, it looks like part of the config is there in the run command (which I would expect), but I don’t see the private key or the peer public key being mentioned, so I have no idea how that docker config would work.