Setting up Caddy

The following configuration works for HTTPS (with an HTTP redirection).

NOTE: Make sure you follow the prerequisites.

Caddy configuration

Create a new virtual host file (assumes /etc/caddy/caddy.conf is your main file, and includes all *.conf files in /etc/caddy/caddy.conf.d/ directory):

sudo nano /etc/caddy/caddy.conf.d/airsonic.conf

Paste the following configuration in the virtual host file:

airsonic.mydomain.com {
    proxy / 127.0.0.1:8080 {
        transparent
    }
}

Check the Caddy config for validity, and then restart the Caddy service:

caddy -conf /etc/caddy/caddy.conf -validate
sudo systemctl restart caddy.service