Move Nix files back to the root of the project

modules/nixos/homelab/audiobookshelf.nix

@@ -0,0 +1,26 @@
+{ config, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.nixosModules.audiobookshelf;
+in
+{
+  options.nixosModules.audiobookshelf.enable = mkEnableOption "Enable audiobookshelf";
+
+  config = mkIf cfg.enable {
+    services = {
+      audiobookshelf = {
+        enable = true;
+
+        port = 4001;
+      };
+
+      caddy.virtualHosts."audiobookshelf.oliverdavies.uk" = {
+        useACMEHost = "oliverdavies.uk";
+
+        extraConfig = "reverse_proxy localhost:${toString config.services.audiobookshelf.port}";
+      };
+    };
+  };
+}