feat: design improvements

flake.nix

@@ -0,0 +1,23 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = import nixpkgs {inherit system;};
+      packages =
+        (with pkgs; [
+          nodejs_18
+          nodePackages.pnpm
+        ]);
+    in {
+      devShell = pkgs.mkShell {
+        buildInputs = packages;
+      };
+    });
+}