Update dockerfile

[joschrew]

This PR is part of series to offer single ocrd modules as Docker Containers (ocrd slim containers) to be used with ocr-d network.

Previously it was based on nvcr.io/nividia. I don't know why I changed it to be based on ocr-d core

[bertsky]

Previously it was based on nvcr.io/nividia. I don't know why I changed it to be based on ocr-d core

I think that's ok, but we should use ocrd/core-cuda instead of plain ocrd/core.

Also, I don't understand why the CI does not trigger anymore. It's obviously broken now, but no logs can be viewed. And on CircleCI it even says there's no active configuration (for me anyway). @kba would you be able to help?

[joschrew]

I have now switched to core-cuda as base image. This image is really huge with 11 GB.

[kba]

Also, I don't understand why the CI does not trigger anymore. It's obviously broken now, but no logs can be viewed. And on CircleCI it even says there's no active configuration (for me anyway). @kba would you be able to help?

Why the builds stopped working altogether, I don't know. I've reset the connection GH/CircleCI. This PR was not tested because building forked PR was turned off.

Tests fail because of an issue with resmgr but I won't waste time debugging this essentially moribund project, tests pass locally.