Probably a rookie error but when I am trying to run the conversion step in [conversion](https://github.com/nicolov/segmentation_keras/tree/master/conversion) by running the docker I get the following error: ``` $sudo docker run -v $(pwd):/workspace -ti `docker build -q .` time="2017-02-09T09:15:11-08:00" level=fatal msg="Cannot locate Dockerfile: Dockerfile" docker: "run" requires a minimum of 1 argument. See 'docker run --help'. ```