new Server(options);

• options （对象）：同上方配置项

const io = require('socket.io')({
  path: '/test',
  serveClient: false,
});

// either
const server = require('http').createServer();

io.attach(server, {
  pingInterval: 10000,
  pingTimeout: 5000,
  cookie: false
});

server.listen(3000);

// or
io.attach(3000, {
  pingInterval: 10000,
  pingTimeout: 5000,
  cookie: false
});