While the Gist is still valid, I published a better method for a retro file server, see https://github.com/tinue/retro-shares/blob/main/README.md
A common challenge with retro machines is transferring data from and to it. If the retro machine has an Ethernet adapter
that can be enabled, then sharing data via a file server is a good solution for this challenge.
Unfortunately, these old systems use protocols that are dangerous and thus disabled on any modern file server, such
as a NAS. Usually, these protocols can be re-enabled on a NAS, but I would advise against doing this.