Add Nix flake

flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "Portfolio";
+
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+  flake-utils.lib.eachDefaultSystem
+  (system:
+    let
+      pkgs = import nixpkgs {
+        inherit system;
+        config.allowUnfree = true;
+      };
+    in {
+      devShells.default = pkgs.mkShell {
+        packages = with pkgs; [
+          jetbrains.webstorm
+          nodejs
+          nodePackages.live-server
+        ];
+
+        shellHook = ''
+          webstorm . && exit
+        '';
+      };
+    }
+  );
+}