i send a file from "react dropzone component" to "node server" and try to upload this with "multer" but no show any error, the file no upload and req.file/s is undefined
var express = require('express');
var router = express.Router();
var msg = require('../helpers/MessageHandler');
var CM = require('../helpers/ContentMessages.json');
var storage = multer.diskStorage({
    destination: function(req, file, cb) {
        cb(null, 'public/uploads/');
    },
    filename: function(req, file, cb) {       
        cb(null, Date.now() + file.originalname);
    }
});
var upload = multer({storage: storage}).any();
var path = '/enterprise';
router.post(path, function(req, res, next) {
    var enterprise = req.body.obj;
    console.log(req.body);
    console.log(req.files);
    console.log(req.file);
    
    upload(req, res, function(err) {
        
        if(err) {
             return res.status(500).json(msg.prototype.errorMsg(err));
        } else {
            return     res.status(200).json(msg.prototype.success(CM.message.success.doc_create, null));
        }
    });
});
the react component is somthing like this, in the fetch function i send a object with all the fields
insertObj (values) {
        console.info(values);
  
        const obj = JSON.stringify({obj: values});
        let url = '/api/v1/enterprise';
        const headers = { 'Content-Type': 'application/json', 'Access-Control-Request-Method': '*'};
        const req = new Request(url, {method: 'POST', headers: headers, body: obj});
  
        fetch(req)
            .then((response) => {
                return response.json();
            })
        .then((enterprise) => {
          console.log(enterprise);
        }).catch((error) => {
           console.log(error);
        });
    }