If the version in your distro's package manager is different, you can install [n](https://www.npmjs.com/package/n) through npm to manage node versions.
It is reccomended that you run Satyr behind a TLS terminating reverse proxy like nginx. An example configuration can be found at install/satyr.nginx. An example systemd service is provided at install/satyr.service. It assumes you've installed satyr into /opt/satyr, and created a satyr user with the home directory /var/lib/satyr for the purpose of running the service.
To backup and restore, you will need to export the mysqlDB. Restore the new database from the backup, then copy the config and site directories to the new location.