The only configuration Symfonium requires is the IP address of the music server with port 4533, plus a username and password.
User twiggs462 uploaded images of their dashboard to the PiHole subreddit. While the original poster makes it very clear that ...
rpi-imager should include an option within the OS customization settings, likely under services, to input a user's Raspberry Pi ID so that upon boot, the OS installation will automatically sign itself ...