So it’s not the same as a fully featured wiki application, but I host a docker instance of VS Code on my NAS pointed at my obsidian vault volume, then SSH tunnel into it when I’m on devices away from home. Foam (VS Code extension) helps add some missing Obsidian features (backlinks pane, syntax highlighting, some autocomplete, cmd-click to navigate wiki links).

I can share more implementation details if anyone's interested; caveat is that unfortunately it doesn’t work on mobile.

Other options I looked into:

1. GitHub - gollum/gollum: A simple, Git-powered wiki with a sweet API and local frontend.
   • this requires you to use git in your vault, which didn't work with my personal set-up, but might not bother you?
2. Raneto - Markdown Knowledgebase for Node.js
   • I couldn’t get this container to load anything in the browser; possibly less an issue with my vault content and more of an issue with my container set-up so maybe it'd work better for you.
3. GitHub - Zavy86/WikiDocs: 📗 Just a databaseless markdown flat-file wiki engine..
   • this version looks like it supports PUID and GUID assignment for volume read/write, if that matters. I didn't try it though.
4. Filestash — Self-hosted client for your data
   • Taking a look in the docker installation instructions, I couldn’t find anywhere to put a local volume mounted to the docker container. I'm pretty sure it doesn’t actually interface with local files, so I didn't test further.