Add vps1 config and associated modules

modules/services/headscale/default.nix

@@ -0,0 +1,43 @@
+{ config, lib, pkgs, inputs, ... }:
+
+with lib;
+
+let
+  cfg = config.modules.services.headscale;
+in {
+  options.modules.services.headscale = {
+    enable = mkOption {
+      default = false;
+      example = true;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.nginx.virtualHosts = {
+      "headscale.vimium.net" = {
+        forceSSL = true;
+        enableACME = true;
+        locations."/" = {
+          proxyPass = "http://localhost:${toString config.services.headscale.port}";
+          proxyWebsockets = true;
+        };
+      };
+    };
+
+    services.headscale = {
+      enable = true;
+      port = 8080;
+      settings = {
+        server_url = "https://headscale.vimium.net";
+        dns_config = {
+          base_domain = "vimium.net";
+        };
+        logtail.enabled = false;
+      };
+    };
+
+    environment.systemPackages = with pkgs; [
+      config.services.headscale.package
+    ];
+  };
+}