add shell.nix

shell.nix

@@ -0,0 +1,23 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+  nvmVersion = "0.38.0";
+in
+
+pkgs.mkShell {
+  buildInputs = [
+    pkgs.nodejs
+    pkgs.git
+  ];
+
+  shellHook = ''
+    export NVM_DIR="$HOME/.nvm"
+    [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
+    [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
+  '';
+
+  # Install nvm
+  postShellHooks = ''
+    curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v${nvmVersion}/install.sh | bash
+  '';
+}