write income files as stream in node js and express

write_stream.js

const express = require('express')
const multer = require('multer')
const upload = multer()
const app = express()

var fs = require('fs');

app.post('/',upload.array('file',4),(req,res)=>{
    req.files.forEach((file)=>{
        console.log(file)
        var stream = fs.createWriteStream(file.originalname)
        stream.write(file.buffer)
        stream.end()
    })

    res.end()


})

app.listen(3000,()=> console.log('running'))