set request entity limit 3mb

server.js

@@ -42,8 +42,8 @@ app.engine('.html', require('ejs').__express);
 app.set('view engine', 'html');
 
 let bodyParser = require('body-parser');
-app.use(bodyParser.urlencoded({extended: false}));
-app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({limit: '3mb', extended: false}));
+app.use(bodyParser.json({limit: '3mb'}));
 
 app.use(session({
     name: 'usersSession',