I went with dokuwiki forever ago. Super stupid simple single container to run (no DB) and writes down to plain text files. I sync it with git every now and then.
My only gripe about it is the dokuwiki syntax and not using normal markdown. I do now have a plugin for that but it’s still just ok. But at this point I might be too engrossed in it to ever really switch. But other than that it works well, is lightweight, has other plugins (email, mermaid flow charts, etc. etc.) and really is pretty maintenance-free.
If there is some better one that is accessible via a browser and doesn’t require a DB then I’d be interested.