added a new host machine

hosts/controller/default.nix

@@ -0,0 +1,80 @@
+{ config, outputs, lib, pkgs, inputs, username, ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+  ];
+
+  nixpkgs = {
+    overlays = [
+      outputs.overlays.additions
+      outputs.overlays.modifications
+      outputs.overlays.unstable-packages
+      outputs.overlays.nur
+    ];
+
+    config = {
+      allowUnfree = true;
+      joypixels.acceptLicense = true;
+    };
+  };
+
+  nix = {
+    settings = {
+      experimental-features = "nix-command flakes";
+      auto-optimise-store = true;
+    };
+  };
+
+  boot = {
+    kernelPackages = pkgs.linuxPackages_zen;
+    initrd.systemd.enable = true;
+
+    loader = {
+      grub.device = "/dev/sda";
+      timeout = 1;
+    };
+  };
+
+  networking = {
+    hostName = "controller";
+  };
+
+  security = {
+    sudo.wheelNeedsPassword = false;
+  };
+
+  programs = {
+    zsh.enable = true;
+    nix-ld.enable = true;
+    dconf.enable = true;
+  };
+
+  services = {
+    openssh = {
+      enable = true;
+      settings = {
+        PermitRootLogin = "no";
+      };
+    };
+  };
+
+  users = {
+    defaultUserShell = pkgs.zsh;
+    users.${username} = {
+      initialPassword = "${username}";
+      isNormalUser = true;
+      extraGroups = [ "networkmanager" "wheel" "storage" ];
+      openssh.authorizedKeys.keys = [
+        ''ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL+OzPUe2ECPC929DqpkM39tl/vdNAXfsRnmrGfR+X3D 0xtux@pm.me''
+      ];
+    };
+  };
+
+  environment.systemPackages = with pkgs;[
+  ];
+
+  fonts.packages = with pkgs; [ (nerdfonts.override { fonts = [ "FiraCode" "JetBrainsMono" ]; }) ];
+
+  system.stateVersion = "23.11";
+}