Add nix config

configuration.nix

@@ -1,4 +1,4 @@
-{ lib, pkgs, ... }:
+{ lib, pkgs, inputs, ... }:
 
 let address = "129.199.146.101";
 in
@@ -69,5 +69,24 @@ in
     recommendedGzipSettings = true;
   };
 
+    nix = {
+    settings = {
+      trusted-users = [ "@wheel" "root" "nix-ssh" ];
+      auto-optimise-store = true;
+    };
+    #package = pkgs.nixUnstable;
+    extraOptions = let
+      empty_registry = builtins.toFile "empty-flake-registry.json"
+        ''{"flakes":[],"version":2}'';
+    in ''
+      experimental-features = nix-command flakes
+      flake-registry = ${empty_registry}
+      builders-use-substitutes = true
+    '';
+    registry.nixpkgs.flake = inputs.nixpkgs;
+    nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
+  };
+
+
   system.stateVersion = "24.05";
 }