Homelab Organization

Hi all!

So I want to get back into self hosting, but every time I have stopped is because I have lack of documentation to fix things that break. So I pose a question, how do you all go about keeping your setup documented? What programs do you use?

I have leaning towards open source software, so things like OneNote, or anything Microsoft are out of the question.

Edit: I didn't want to add another post and annoy people, but had another inquiry:

What ReverseProxy do you use? I plan to run a bunch of services from docker, and would like to be able to reserve an IP:Port to something like service.mylocaldomain.lan

I already have Unbound setup on my PiHole, so I have the ability to set DNS records internally.

Bonus points if whatever ReverseProxy setup can accomplish SSL cert automation.