This blogpost may be a bit old but is very valid as it goes through the points that an admin has to keep an eye on, verify the proper work and maintain regarding a Mastodon instance

This Guide will show you how to migrate an existing Mastodon dockerized instance to a new Server without docker.
Even the article dates from June 2021, it's a good overview about the steps to perform

A guide to install Mastodon, including ElasticSearch and some tricks to keep it low memory

Spawn a Nginx webserver with a bunch of static JSON files that behaves like a Mastodon instance

Thats a simples script to import yours tweets from any Twitter account to a Mastodon account, in any instance.