Exercise: https://classroom.google.com/u/0/c/NDgwNDYwMTI2OTAz/a/NTE1NzQyNzI4OTEx/details

By @xavi-mat.

• Start a server with express and log a sentence on console.

• Create a server with several endpoints (get, post, put, delete).

• Create a server with functional endpoints

• Create a functional FrontEnd for the Exercise 3