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";
+}

hosts/controller/hardware-configuration.nix

@@ -0,0 +1,39 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [
+      (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    {
+      device = "/dev/disk/by-uuid/b5a9a9f6-be72-4520-b2ac-439d0479a34b";
+      fsType = "ext4";
+    };
+
+  fileSystems."/efi" =
+    {
+      device = "systemd-1";
+      fsType = "autofs";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}