vue-cli app и socket.io

<template>
  <div id="app">
    <span v-if="isConnected">Connected!!!</span><br/>
    <strong>Server Stats</strong><br>
    RSS: <span id='rss' :v-model="rss">{{rss}}</span><br/>
    Heap total: <span id='heapTotal' :v-model="heapTotal">{{heapTotal}}</span><br>
    Heap used: <span id='heapUsed' :v-model="heapUsed">{{heapUsed}}</span><br>
  </div>
</template>

<script>
export default {
  name: 'app',
  data() {
    return {
      heapUsed: '',
      heapTotal:'',
      rss:'',
      isConnected: false,
    }
  },
  sockets: {
    connect() {
      this.isConnected = true;
    },
    dissconnect() {
      this.isConnected = false;
    }
  }
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  margin-top: 60px;
}
</style>

import Vue from 'vue'
import App from './App.vue'
import VueSocketIO from 'vue-socket.io'

Vue.config.productionTip = false;
Vue.use(new VueSocketIO({
  debug: false,
  connection: 'http://localhost:3000'
}));

new Vue({
  render: h => h(App),
}).$mount('#app');

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.use((req, res, next) => {
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
  res.setHeader('Access-Control-Allow-Credentials', true);

  next();
});

app.get('/', (req, res) => {
  let time = setInterval(() => {
    res.send(JSON.stringify(process.memoryUsage()));
  },100);
});

io.on('connection', socket => {
  socket.on('disconnect', () => {
  });
});

http.listen(3000, () => {
  console.log('Listening on *:3000');
});