What tool do you use to display your self-hosting infrastructure

Hey, I have to „draw“ or make notes of my selfhosting stuff. It runs so smooth that I sometimes really forget where a service is running or how to reach the web-Interface.

For sure I have a password- and link-manager, but I would like another independent note with the structure of my selfhosting.

Usually I use Joplin. Is there a plugin that shows me a kind of a map?

Or are there other apps - maybe wikis - that do it much easier/better than that?

How do you document your selfhosting?