node.js - Connection vuejs with socket.io

Question

I'm trying to connect socket.io with vuejs. Running 'node server' on the terminal does nothing and when I visit http://localhost:3000/ it gives Cannot GET /. Plus on the client side, I keep getting the error sockjs-node ERR_CONNECTION_TIMED_OUT

Server

const express = require('express')
const app = express()
const server = require('http').Server(app)
const io = require('socket.io')(server,{
  cors: {
    origin: "http://localhost:8080",
    methods: ["GET", "POST"]
  }
})

io.on('connection', socket => {
  socket.on('join-room', (roomId, userId) => {
    socket.join(roomId)
    socket.to(roomId).broadcast.emit('user-connected', userId)

    socket.on('disconnect', () => {
      socket.to(roomId).broadcast.emit('user-disconnected', userId)
    })
  })
})

server.listen(3000)

Vue

<script>
import io from "socket.io-client";
import Peer from "peerjs";
var socket = io.connect("http://localhost:3000");

export default {
    created(){
        const myPeer = new Peer(undefined, {
            host: '/',
            port: '3002'
        })
        myPeer.on('open', id => {
            socket.emit('join-room', this.$route.params.id, id)
        })
        socket.on('user-connected', userId => {
            console.log('user connected')
        })
    }
}
</script>

Answer 1

等待大神答复