Add some modules for game hosting

modules/zeroad.nix

@@ -0,0 +1,36 @@
+{ config, lib, pkgs, ... }:
+
+{
+  options = {
+    chvp.zeroad = {
+      enable = lib.mkOption {
+        default = false;
+        example = true;
+      };
+      asServer = lib.mkOption {
+        default = false;
+        example = true;
+      };
+    };
+  };
+
+  config = lib.mkIf config.chvp.zeroad.enable {
+    chvp.zfs.homeLinks = [
+      { path = ".config/0ad"; type = "cache"; }
+    ];
+
+    nixpkgs.config.permittedInsecurePackages = [
+      "spidermonkey-38.8.0"
+    ];
+
+    hardware.opengl.enable = true;
+    home-manager.users.charlotte = { pkgs, ... }: {
+      home.packages = [ pkgs.zeroad ];
+    };
+    networking.firewall = lib.mkIf config.chvp.zeroad.asServer {
+      allowedTCPPorts = [ 20595 ];
+      allowedUDPPorts = [ 20595 ];
+    };
+    services.openssh.forwardX11 = lib.mkDefault config.chvp.zeroad.asServer;
+  };
+}