server.js

import express from 'express';
import multer from 'multer';
import cors from 'cors';
import path from 'path';
import fs from 'fs';

const app = express()
app.use(cors());

const storage = multer.diskStorage({
    destination: function (req, file, cb) {
        try {
            fs.mkdirSync(path.join(process.cwd(), 'uploads'));
        }catch(e) {}
        cb(null, path.join(process.cwd(), 'uploads'))
    },
    filename: function (req, file, cb) {
        const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9) + '-' + file.originalname
        cb(null, uniqueSuffix)
    }
});
const upload = multer({ 
    dest: 'uploads/',
    storage
})

app.post('/upload', upload.single('file'), function (req, res, next) {
  console.log('req.file', req.file);
  console.log('req.body', req.body);

  res.end(JSON.stringify({
    message: 'success'
  }));
})

app.listen(3333);