Running the app

[OkFranco]

Hello! I was trying to follow the section 4 instructions on "Making a complete server", but it was not clear that I had to run the app, but primarily what was the expected output of a running app. Since the output gets an red message, it seems it is an error.

For future references it would be good to have more detail about the expected output of a running.

Thanks and continue the amazing job!!

João Franco