switched to flakes and built out modularity

modules/services/navidrome.nix

@@ -0,0 +1,20 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.control.navidrome;
+in
+{
+  config = lib.mkIf cfg.enable {
+    services.navidrome = {
+      enable = true;
+      settings = {
+        Address = "0.0.0.0";
+        Port = cfg.port;
+        MusicFolder = cfg.musicFolder;
+        DataFolder = cfg.dataFolder;
+      };
+    };
+
+    networking.firewall.allowedTCPPorts = lib.optionals cfg.openFirewall [ cfg.port ];
+  };
+}