Set up networking for lappy specifically.

nodes/hosts/lappy/configuration.nix

@@ -11,6 +11,7 @@
       ./filesystems.nix
       ./programs/sof-firmware.nix
       ./services/touchpad.nix
+      ./system/networking.nix
     ];
 
   # Use the systemd-boot EFI boot loader.
@@ -21,11 +22,6 @@
   # Use latest kernel.
   boot.kernelPackages = pkgs.linuxPackages_latest;
 
-  networking.hostName = "lappy"; # Define your hostname.
-  # Pick only one of the below networking options.
-  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
-  networking.networkmanager.enable = true;  # Easiest to use and most distros use this by default.
-
   system.stateVersion = "25.05"; # Did you read the comment?
 
 }