America has already used all of the tools of fascism before, often to greater extremes. Lebensraum found its inspiration in Manifest Destiny, for example.
Expect to see things you have seen before, but now with clearer eyes. When Dems want to double their police forces and tighten preparedness of the national guard instead of maintaining or increasing social spending, recognize that the boots they are lacing are intended for your necks.
Set up a proper backup system for your server. I like to use borg. Just to be safe, make a copy of your drive as well (like full disk rsync). Then do a clean install and restore as if your drive had failed. If your backups missed anything, you will now know and can fix your backup system and can still recover from your rsync'd drive.
You might also want to take this opportunity to start administering your server with code, like using ansible or other remote provisioning tools. This makes your system configuration reproducible so that you only really need to back up a few kinds of data like media files or databases.