Autorun some code cells jupyterlab3

Thanks for your work. I have put this in a textfile and dir autorun3. I have installed node.js and here it states, that one could do jupyter labextension install autorun3 for local extensions, but I get the error, that it is not a npm package. Maybe that’s out of the thread, that @adpatter has solved, but to be able to test it, could sb elaborate how to run that locally?