Improve a simple HTTP server example in README.

[stawiski]

Hi,

The simple HTTP server example which is the first thing people see going to the main page of the repo could be slightly improved with couple of simple changes like adding Connection: close or Content-Length.

Cheers

[marcelstoer]

That's a well-meant but dangerous "improvement", see https://nodemcu.readthedocs.io/en/latest/modules/net/#note.

[stawiski]

That's a well-meant but dangerous "improvement", see https://nodemcu.readthedocs.io/en/latest/modules/net/#note.

Ok thanks, that's an easy fix to combine it to one send. Will post an update.