Test .dockerignore ignoring Dockerfile on Quay.io

Suspected bug

When a .dockerignore is used that ignores Dockerfile, quay.io refuses to build the image, complaining that the Dockerfile cannot be found. This is, IMHO, unexpected behaviour, since the official docs clearly state that:

You can even use the .dockerignore file to exclude the Dockerfile and .dockerignore files. These files are still sent to the daemon because it needs them to do its job. But the ADD and COPY commands do not copy them to the image.

Also note that building this image works flawlessly both locally, with

$ docker build --tag pancho/test-dockerignore-on-quay:locally-built .

and on hub.docker.com, but fails on quay.io.

Thanks for watching.

UPDATE 20200404

I've checked and this now works OK on Quay.io. Archiving...