add modules.server

modules/server/default.nix

@@ -0,0 +1,22 @@
+{ lib, config, pkgs, ... }:
+with lib;
+let
+  psCfg = config.pub-solar;
+  cfg = config.pub-solar.server;
+in
+{
+  options.pub-solar.server = {
+    enable = mkEnableOption "Enable server options like sshd";
+  };
+
+  config = mkIf cfg.enable {
+    pub-solar.core.lite = true;
+
+    services.openssh = {
+      enable = true;
+      permitRootLogin = lib.mkForce "prohibit-password";
+      passwordAuthentication = true;
+      openFirewall = true;
+    };
+  };
+}