Add NixOS support

configuration.nix

@@ -0,0 +1,91 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [ ./hardware-configuration.nix ];
+  nixpkgs.config.allowUnfree = true;
+
+  # Bootloader.
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  # Enable networking
+  networking.hostName = "trudepc";
+  networking.networkmanager.enable = true;
+
+  # Select internationalisation properties.
+  time.timeZone = "Europe/Lisbon";
+  i18n.defaultLocale = "en_US.UTF-8";
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "pt_PT.UTF-8";
+    LC_IDENTIFICATION = "pt_PT.UTF-8";
+    LC_MEASUREMENT = "pt_PT.UTF-8";
+    LC_MONETARY = "pt_PT.UTF-8";
+    LC_NAME = "pt_PT.UTF-8";
+    LC_NUMERIC = "pt_PT.UTF-8";
+    LC_PAPER = "pt_PT.UTF-8";
+    LC_TELEPHONE = "pt_PT.UTF-8";
+    LC_TIME = "pt_PT.UTF-8";
+  };
+
+  # Enable the GNOME windowing system.
+  services.xserver.enable = true;
+  services.xserver.displayManager.gdm.enable = true;
+  services.xserver.desktopManager.gnome.enable = true;
+  services.printing.enable = true; # CUPS
+  services.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+    # If you want to use JACK applications, uncomment this
+    #jack.enable = true;
+  };
+  # Enable touchpad support (enabled default in most desktopManager).
+  # services.xserver.libinput.enable = true;
+
+  # Configure keymap in X11
+  services.xserver.xkb = {
+    layout = "us";
+    variant = "altgr-intl";
+  };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.trude = {
+    isNormalUser = true;
+    description = "TrudeEH";
+    extraGroups = [ "networkmanager" "wheel" ];
+    packages = with pkgs; [ # GUI and user apps
+      vscode brave discord prismlauncher
+    ];
+  };
+
+  # System packages
+  environment.systemPackages = with pkgs; [
+    git curl wget pass lynis bat
+    neovim tmux htop fzf
+  ];
+
+  programs.gnupg.agent.enable = true;
+
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true;
+    dedicatedServer.openFirewall = true;
+  };
+
+  # Firewall
+  networking.firewall.allowedTCPPorts = [ 22 ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+
+  # Allow running executables.
+  programs.nix-ld = {
+    enable = true;
+    libraries = with pkgs; [
+      # Add any missing dynamic libraries for unpacked programs here.
+    ];
+  };
+
+  system.stateVersion = "24.11"; # Don't change this value.
+}