mopidy service: add default value for configuration (#17385)

Mopidy will start if the configuration is empty.

Fixes #17381.

Changed files
+1
nixos
modules
services
audio
+1
nixos/modules/services/audio/mopidy.nix
···
};
configuration = mkOption {
+
default = "";
type = types.lines;
description = ''
The configuration that Mopidy should use.