nodeJS image upload

const http = require('http');
const express = require('express')
const path = require('path')
const fs = require('fs')
const bodyParser = require('body-parser')
const Busboy = require('busboy')

let app = express();

app.use(bodyParser.json())

app.get('/', (req, res) => {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.write('<form action="fileupload" method="post" enctype="multipart/form-data">');
    res.write('<input type="file" name="filetoupload"><br>');
    res.write('<input type="submit">');
    res.write('</form>');
    return res.end();
})
app.post('/fileupload', (req, res) => {
    var busboy = new Busboy({ headers: req.headers });
    busboy.on('file', (fieldname, file, filename, encoding, mimetype) => {
      var saveTo = path.join(__dirname, '/images/' + filename);
      file.pipe(fs.createWriteStream(saveTo));
    });
    busboy.on('finish', () => {
      res.writeHead(200, { 'Connection': 'close' });
      res.end("That's all folks!");
    });
    return req.pipe(busboy);    
});
app.listen(3000);