Construct a base cygwin docker environment

The basic method is to choose a windows base environment, next interactively install cygwin in a host directory, use https://www.cygwin.com/setup-x86_64.exe Install apt-cyg from https://github.com/ilatypov/apt-cyg/blob/master/apt-cyg in the docker image. Using docker create an image with the cygwin host directory copied to the guest docker image: use docker cp

Using this process an image was created

https://cloud.docker.com/u/tomrake/repository/docker/tomrake/cygwin

Next iteration

Need to add a normal user.