update README

Author: DerThorsten

README.md

@@ -10,6 +10,7 @@ A driver to run python code in a wasm environment, almost like running vanilla p
 Here we assume a file `main.py` located at `~/foo/bar/main.py`.
 
 ```bash
+# run with node
 pyjs_code_runner run script \
     node \
     --conda-env     ~/micromamba/envs/my_env         `# the emscripten-forge env`          \