Upload a sound file in NODEJS

upload.js

const fs = require('fs');
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
const port = 3000;

app.use(bodyParser.json({ limit: '50mb' }));
app.use(bodyParser.raw({ type: 'audio/wav', limit: '50mb' }));

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

app.post('/upload', function (req, res) {
	console.log("RECIEVED: ", req.body);
	fs.writeFile('audio.wav', req.body, (err) => {
		if (err) throw err;
		console.log('The file has been saved!');
	});
	res.send("Ok");
});

app.listen(port, () => console.log(`Example app listening on port ${port}!`))