Bookstack is a really nice wiki/documentation tool.

You may also like wiki.js or even just storing markdown files in a git repo. Lately I've been using Obsidian to manage some notes about servers, but am thinking of going back to bookstack to "publish" docs for others.

I like this solution: https://squidfunk.github.io/mkdocs-material/

I know this is the self-hosted Community, but I would use GitHub for that use case. I like to keep notes and links in plaintext files, and then store those instruction documents together in a project with any files needed for the project (like config files), that can then ask be easily pulled to the device you're working on. You can also get fancy and store the instructions in batch files that actually carry out the steps for you.

Of course something very similar could be achieved with a self-hosted git instance, but I like using GitHub because I like having the web interface and Pages option when those are relevant.

I just have a bunch of text files (org) and sync them on all my computers with Syncthing. Works great so far.

Personnally I love Obsidian. It's markdown based so your can store and review documentation in git.

You can also link documents with each other with a very simple syntax and see a map of the created links.

I personally use Bookstack for this and love it

This is a non self hosted answer. Apologize for that. But personally I use one note for this purpose at work. At home I have a lot less so I just keep a txt document.

Sticking around in case someone posts a good solution I haven’t heard of.