Setup VNC server on pianonix

systems/aarch64-linux/pianonix/default.nix

@@ -66,6 +66,20 @@
     user = "julian";
   };
 
+  systemd.services.x11vnc = {
+    description = "Run x11vnc server";
+    after = [ "display-manager.service" ];
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      ExecStart = "${pkgs.x11vnc}/bin/x11vnc -rfbauth ${
+        config.sops.secrets."vnc-passwd".path
+      } -forever -loop -noxdamage -repeat -rfbport 5900 -shared";
+      User = config.users.users.julian.name;
+      Restart = "on-failure";
+      Environment = "DISPLAY=:0";
+    };
+  };
+
   boot.loader.timeout = 1; # Set boot loader timeout to 1s
 
   programs.dconf.enable = true;
@@ -134,15 +148,11 @@
     mc
   ];
 
-  # VNC server
-  # services.x2goserver.enable = true;
+  networking.firewall.enable = true;
 
-  # networking.firewall.enable = false;
-
-  # networking.firewall.allowedTCPPorts = [
-  #   8000
-  #   5901
-  # ];
+  networking.firewall.allowedTCPPorts = [
+    5900 # for vnc
+  ];
 
   # Disable the GNOME3/GDM auto-suspend feature that cannot be disabled in GUI!
   # If no user is logged in, the machine will power down after 20 minutes.