Bump protocol, at least to GitLab 13.3
Currently the main development branch of Heptapod is based on GitLab 13.3, and it's quite possible that we bump to GitLab 13.4 for Heptapod 0.17.
But the Gitaly protocol we're using is older, dating back to GitLab 13.1 or even 12.x.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information