index.js

const express = require('express')
const app = express()
const port = 5000
const bodyParser = require('body-parser');
const {User} = require('./models/User');
const config = require('./config/key')

app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());

const mongoose = require('mongoose')
mongoose.connect(config.mongoURL, {
    useNewUrlParser : true, useUnifiedTopology : true, useCreateIndex : true, useFindAndModify : false
}).then(() => console.log('MongoDB connected...'))
  .catch(err => console.log('arr'));

app.get('/', (req, res) => res.send('Hello World! jaeeun'));

app.post('/register', (req, res) => {
  const user = new User(req.body)
  user.save((err, userInfo) => {
    if(err) return res.json({ success : false, err})
    return res.status(200).json({
      success: true
    })
  })
})

app.listen(port, () => console.log(`Example app listening at http://localhost:${port}`))