Front : create class to connect, send and receive message

- Create environment class
 - Create Connexion class to connect and save data
 - Refactor back api

back/src/App.ts

@@ -2,7 +2,7 @@
 import {IoSocketController} from "./Controller/IoSocketController"; //TODO fix import by "_Controller/..."
 import {AuthenticateController} from "./Controller/AuthenticateController"; //TODO fix import by "_Controller/..."
 import express from "express";
-import {Application} from 'express';
+import {Application, Request, Response} from 'express';
 import bodyParser = require('body-parser');
 import * as http from "http";
 
@@ -28,6 +28,11 @@ class App {
     private config(): void {
         this.app.use(bodyParser.json());
         this.app.use(bodyParser.urlencoded({extended: false}));
+        this.app.use(function (req: Request, res: Response, next) {
+            res.header("Access-Control-Allow-Origin", "*"); // update to match the domain you will make the request from
+            res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
+            next();
+        });
     }
 }