socket io transport polling

If you have got http://127.0.0.1:8000/socket.io/?EIO=3&transport=polling&t=
You have to write

var Hapi = require('hapi');
var server = new Hapi.Server();

server.connection({
host: '0.0.0.0',
port: Number(process.env.PORT)
});

var io = require('socket.io')(server.listener);

server.start();