fix on blocked cross local request

ChatService/server.js

@@ -17,6 +17,14 @@ mongoose.connect(db.url, {
 });
 mongoose.Promise = global.Promise; // connect to our mongoDB database
 
+app.use(function (req, res, next) {
+    res.setHeader('Access-Control-Allow-Origin', '*');
+    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE');
+    res.setHeader('Access-Control-Allow-Headers', 'Content-Type');
+    res.setHeader('Access-Control-Allow-Credentials', true);
+    next();
+    });
+
 // get all data/stuff of the body (POST) parameters
 app.use(bodyParser.json()); // parse application/json 
 app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json