I've been using YunoHost for some time. Cosmos seems good, too. Both do most of the stuff for you and should come with documentation. I think that's the way to go if you can't set it all up yourself, or lack time to maintain it.

I've also used Docker containers and plain Debian. I use NGinx as a reverse proxy.

I document things in text files (markdown). At some point it'd like to upload them with something like mkdocs or to a wiki. But since it's just me, having them just sitting in a directory on my laptop is fine.