API: Error 500 on `GET /projects/:id/hgrc` before any PUT
Noticed while updating the FAQ to explain how to tweak Heptapod with the API.
The error is likely due to the file not existing yet. After a successful
PUT, there's no error any more, and that explains also why the functional tests didn't catch it.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information