All of your issues can be solved by a backup. My host went out of business. I set up a new server, pulled my backups, and was up and running in less than an hour.
I’d recommend docker compose. Each service gets its own folder inside your docker folder. All volumes are a folder in the services folder. Each night, run a script that stops all of them, starts duplicati, backs up to a remote server or webdav share or whatever, and then starts them back up again. If you want to be extra safe, back up to two locations. It’s not that complicated if it’s just your own services.
Yeah, and I assume future me will be even dumber than present day me, so I try to make it really easy for him to find out what he needs to know.
Another good tip is to put timestamps and increase the length of your bash history. That way when I log in half a year from now I’ll know what I was up to.