update

shell.nix

@@ -0,0 +1,15 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    nodejs
+    yarn
+    python313    
+    python313Packages.numpy
+  ];
+
+  shellHook = ''
+    echo "Welcome to the project development shell!"
+    export MY_PROJECT_VAR="hello"
+  '';
+}