Fix invalid local uploads path

[akcyp]

File upload provider does not consider the strapi configuration. This patch should fix the problem.

Description of what you did:

const path = require('path');
const strapiDir = path.join(__dirname, './backend');

const Strapi = require(path.join(strapiDir, `/node_modules/strapi`));
const strapi = Strapi({
  dir: strapiDir
});
strapi.start();

This configuration generates the following error when uploading the image:

ENOENT: no such file or directory, open 'C:\Users\XYZ\Desktop\backend\public\uploads\screenshot_862571e640.jpeg'

The correct directory should be:

C:\Users\XYZ\Desktop\app\backend\public\uploads\screenshot_862571e640.jpeg