[Server-Side Testing] Index page doesn't load immediately

[otajor]

https://github.com/FAC7/READMEs/blob/master/week4/server-testing-tutorial/server.js#L9

If you start the server and go to localhost:8000, it stays loading forever instead of loading index. I guess this is because the if statement isn't kicking in - maybe url.length is not 1?

We had to add another else branch at the end to make it load..

@katbow @RobStallion