Initialized flake and home-manager with flake

flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "NixOS configuration";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = inputs@{ nixpkgs, home-manager, ... }:
+  let
+    system = "x86_64-linux";
+  in
+  {
+    nixosConfigurations = {
+      nixos = nixpkgs.lib.nixosSystem {
+        system = system;
+        modules = [
+	  ./configuration.nix
+	  home-manager.nixosModules.home-manager
+	  {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.martin = import ./home.nix;
+	  }
+	];
+      };
+    };
+  };
+}