p50 updates

modules/nixos/gnome.nix

@@ -0,0 +1,14 @@
+{ config, pkgs, ... }:
+
+{
+  services.displayManager.gdm.enable = true;
+  services.desktopManager.gnome.enable = true;
+
+  # To disable installing GNOME's suite of applications
+  # and only be left with GNOME shell.
+  # services.gnome.core-apps.enable = false;
+  services.gnome.core-developer-tools.enable = false;
+  services.gnome.games.enable = false;
+  environment.gnome.excludePackages = with pkgs; [ gnome-tour gnome-user-docs ];
+
+}