OCRopus is a Docker container.
This is a simple way of getting an OCRopus OCR system installed.
You can run OCRopus with a command like:
docker run -v `pwd`:/work tmbdev/ocropus /ocropus/ocropy/ocropus-rpred *.png
You can also do training and all the other operations you'd normally run with an OCRopus installation. See the Docker documentation to see how you need to use the -v flag and other flags.