If you're running a #mastodon instance and it has more than just your personal toots housed on it -- you are responsible for the safety and longevity of that data. People are investing time and effort into communication on your platform. You owe it to them to keep regular off-site backups, and learning how to run this bloody thing so it doesn't explode on you one day and leave you saying: "why did docker delete my database", or " my vps provider shut me down, and I've lost all my user data".
Its cool if you want to set it up for fun and poke around, but I've seen and heard of instances with hundreds of users and thousands of toots just dissapearing into the night.
Heck, a bunch of the sidekiq tasks are failed because some instances DNS doesn't event resolve anymore for users who are followed from people on my instance.