I‘m an old fart using FreeBSD and jails, in the jails mostly bare metal install. Home assistant runs in bhyve, one docker app (audiobookshelf) runs in bhyve as well (alpine linux and docker)

Writefreely can be selfhosted. simple config, no themes (or limited if i remember correctly). But it just works.

Have a look at Silverbullet, selfhosting is fairly easy, using it on one device (offline) as well. Watch the videos, it’s quite powerful.