A more detailed walkthrough.
Install ffmpeg(>= 4.2.1) and mysql through your distribution's package manager. See this page for instructions on installing node v10. If the version in your distro's package manager is different, you can install n through npm to manage node versions.
Before starting, you should create a system user to run the satyr service.
Clone the repository and change to the directory
git clone https://pond.waldn.net/git/knotteye/satyr.git cd satyr
Install nodejs dependencies
Run the setup script to generate a config file and database setup.
npm run setup
Look over the generated config file in config/generated.yml, and move it to config/config.yml when you're satisfied. Run the setup script for the database.
sudo mysql source install/db_setup.sql;
Then start the server.
npm run start
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.
Updating should be as simple as pulling the latest code and dependencies, then restarting the server.
git pull npm i npm update
Then restart the server.
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.