Changes:
https://gitlab.com/gitlab-org/gitlab-workhorse/-/blob/master/CHANGELOG

- Support alternate document root directory
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/626

- Fix uploader not returning 413 when artifact too large
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/663
- Auto-register Prometheus metrics
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/660

- Do not resize when image is less than 8 bytes
  https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/666