We configured Paperclip to convert images to JPG in some cases but I
omitted that here because we don't need it. If an image is better
represented as PNG or another format then the user should be able to
choose that.
Some specs were also testing the generated URL but the Active Storage
URL doesn't contain a style name anymore and it's not helpful to test
the URL.
- Add a fixture image to do the upload thanks to `fixture_file_upload`
- Check the response status, the content type and the response body for both logo image and promo image
