Re-added nix :)

flake.nix

@@ -0,0 +1,37 @@
+{
+  description = "atashdotdev dev shell";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      allSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      forAllSystems = f: nixpkgs.lib.genAttrs allSystems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
+    in
+    {
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            nodejs_20
+            nodePackages.pnpm
+          ];
+
+          shellHook = ''
+            echo "<atashdotdev dev shell>"
+            echo "Node version: $(node --version)"
+            echo "pnpm version: $(pnpm --version)"
+          '';
+        };
+      });
+    };
+}