add install guide

hosts/common/default.nix

@@ -123,8 +123,6 @@
   # Enable touchpad support (enabled default in most desktopManager).
   # services.xserver.libinput.enable = true;
 
-  programs.zsh.enable = true;
-
   users.groups.plugdev = {};
 
   # Allow unfree packages

hosts/earth/configuration.nix

@@ -131,6 +131,7 @@
   #   };
   # };
 
+  programs.zsh.enable = true;
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.zack = {
     isNormalUser = true;

hosts/vm/configuration.nix

@@ -0,0 +1,38 @@
+{
+  pkgs,
+  inputs,
+  ...
+}: {
+  imports = [
+    ../common/default.nix
+  ];
+
+  programs.zsh.enable = true;
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.zack = {
+    isNormalUser = true;
+    description = "zack";
+    extraGroups = ["networkmanager" "wheel" "docker" "libvirtd" "plugdev"];
+    shell = pkgs.zsh;
+    packages = with pkgs; [
+      firefox
+      kate
+      rio
+      telegram-desktop
+      kitty
+    ];
+  };
+
+  home-manager = {
+    extraSpecialArgs = {inherit inputs;};
+    users = {
+      "zack" = {
+        imports = [../../modules/home-manager/zack.nix];
+        _module.args.theme = import ../../core/theme.nix;
+
+        home.username = "zack";
+        home.homeDirectory = "/home/zack";
+      };
+    };
+  };
+}