Issue #2861975 by wouters_f, skek, jansete, joelfp, raymond880824: Implements image style generation like Drupal 7
Issue #2866256 by jansete, raymond880824: After login the sites, some image cannot display in the website
Issue #2866314 by jansete: Notice: Undefined index: use_instance_profile en Drupal\s3fs\S3fsService->getAmazonS3Client()
Issue #2863196 by jansete: Basic PathProcessor and ImageStyleDownloadController for image styles generation
Issue #2860159 by jansete: Exception in admin/config/media/file-system when s3fs is enabled but not configured