add wings package and module

modules/wings/default.nix

@@ -0,0 +1,42 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.wings;
+  wings = cfg.package or pkgs.wings;
+in
+{
+  options.services.wings = {
+    enable = lib.mkEnableOption "Enable Pterodactyl Wings";
+    package = lib.mkOption {
+      type = lib.types.package;
+      default = null;
+      description = "Package to use for Wings daemon";
+    };
+    configFile = lib.mkOption {
+      type = lib.types.path;
+      default = "/etc/pterodactyl/config.yml";
+      description = "Path to Wings configuration";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    virtualisation.docker.enable = true;
+
+    systemd.services.wings = {
+      description = "Pterodactyl Wings";
+      after = [ "docker.service" ];
+      requires = [ "docker.service" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        ExecStart = "${wings}/bin/wings --config ${cfg.configFile}";
+        Restart = "on-failure";
+        RestartSec = 5;
+        DynamicUser = true;
+        StateDirectory = "wings";
+        BindPaths = [ "/var/run/docker.sock" ];
+        LimitNOFILE = 1048576;
+      };
+    };
+  };
+}