Express Architecture

### Node Modules
A *package* file has been added to manage the Node modules, using *npm*

### Express Architecture
An Express-like architecture has been set for the server, separating *Models*, *Services* &*Views*.

### Basic Stuff
Some basic operations and layout has been added, from a previous project. They cover HTTPS, users login, error handling, logs, ... Not everything will be useful maybe.


No test has been run, since it's only about architecture and fragments of useful codes.