chore(callisto): set time zone and enable mullvad vpn

modules/linux/core/default.nix

@@ -107,6 +107,8 @@ in
 
     services.gnome.gnome-keyring.enable = true;
 
+    services.resolved.enable = true;
+
     nix = lib.mkIf cfg.nixSaneDefaults {
       gc = lib.mkIf (!cfg.useNh) {
         automatic = true;

reference/hosts/callisto/configuration.nix

@@ -11,7 +11,8 @@
   imports = [ ./hardware-configuration.nix ];
 
   networking.hostName = "callisto";
-  time.timeZone = "America/Los_Angeles";
+  # time.timeZone = "America/Los_Angeles";
+  time.timeZone = "Asia/Shanghai";
 
   liminalOS = {
     flakeLocation = "/home/youwen/.config/liminalOS";
@@ -27,6 +28,11 @@
     };
   };
 
+  services.mullvad-vpn = {
+    enable = true;
+    package = pkgs.mullvad-vpn;
+  };
+
   boot = {
     loader.systemd-boot.enable = true;
     loader.efi.canTouchEfiVariables = false;