Catching up

A few new features have been added!

• You can now set PROXIED_AUTH_HEADER to a proxy header for use with forward auth systems like authentik (e.x. PROXIED_AUTH_HEADER=X-Authentik-Username), users must already exist on the instance. I tried making it skip authentication, but I ended up making it automatically pass a token to the user if the header is set.
• Backups now run async without a request context! It also uses this to pipe the tar output over the websocket. It runs by effectively taking over the run_server function, which has the bonus of preventing the server from starting during a backup, and prevents the container from stopping until the backup is finished! This required reimplementing the backup function, and adding a “command” parameter to the run_server function, but it works great!