Agreed!
Would love to see the Joplin and/or Joplin Server be available as a container from LinuxServer!
Joplin is a fantastic markdown based notes app. I use Joplin on Ubuntu, iOS and macOS. The instances sync via my Nextcloud server. The Joplin Server is a release build, but aims to replace the NextCloud webdav based syncing with a more efficient sync process that also allows sharing of notes/notebooks to other people.