File Upload Nodejs

I'm breaking my head here to try to upload images with Nodejs but it's being "freud".

I am developing an api where you will have access from three domains. So the structure of my api is basically:

public
src
  company
    ... *.js
    routes.js
  client
    ... *.js
    routes.js
  admin
    ... *.js
    routes.js
  routes
    routes.js
  app.js

In each directory destined for your respective domain, I have the route file calling your controllers. An example, the routes accessed by the company domain:

router.get('/c/:id', auth.authorize, controller.getData);
router.post('/login', controller.login);
router.post('/register', controller.create);
router.get('/activate/:code', controller.checkActivationCode);
router.put('/update/:id/:section', auth.authorize, controller.update);
router.get('/get_business_hours', auth.authorize, controller.getBusinessHours);
router.post('/logo', auth.authorize, imgUpload);

module.exports = router;

In the routes directory, I get these routes from each domain and condensa in a single file, thus:

'use strict';

const express = require('express');
const app = express();
const router = express.Router();

router.get('/', (req, res) => {
    res.status(200).send({
        version: "1.0.0"
    });
});

const companyRoutes = require('../company/routes/company');

app.use('/', router);
app.use('/api/company/', companyRoutes);

module.exports = app;

As I will have many routes since there will be three domains accessing, subdivide this way. But here comes the problem, in the post ('/ logo') route, where the multer calls to store the image, the file is not uploaded.

In the image upload controller it looks like this:

const multer = require('multer');

var storage = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, '/public/')
    },
    filename: function (req, file, cb) {
        cb(null, file.fieldname + '-' + Date.now())
    }
})

var upload = multer({ storage: storage }).single('logo')

module.exports = upload;