A great question. First of all, all of my services run with docker compose and use volumes for their config storage which get backed up regularly. Then I just use markdown files organized by having a separate file for each service. Basically anything I would need to reproduce my setup on a new machine is what I try to write down. All the docs and compose yaml files are versioned in git. I usually realize I left out info later on and add it as it occurs to me, typically if I have to set up the services on a new machine. This all applies to any software that needs more than a little config, not just apps hosted for the purpose of other machines using them. It’s a very imperfect process, but it’s a ton better than what I used to do which was think “eh I’ll remember how it’s setup”. I rarely would remember all the key details.

That post title reads like nerdy mad libs