Remove the python server reference

As we already have a package.json aka a NPM config file, I would go for a Node Server instructions in the README, instead of the Python Server you mention here:

python3 -m http.server 8001

As the issue is that the developer presumably do not have python3 installed on his machine, and I am not sure we want to push that when the component is client-side oriented.

I suggest to use https://www.npmjs.com/package/http-server