For a long time, I used Syncthing for my Joplin notes. It was running as a Docker image on my TrueNAS server. The notes themselves were on the TrueNAS server, and from there, Syncthing would sync it to my PC and laptop, for example.
I am annoyed, however, at some desyncing issues. Have you guys got ideas on how to better solve this?
I use Zim Wiki + git. Or gollum wiki, which also uses git. Works both very well and can not only be synced but automatically merged.