Requirements:
- lack of expectations regarding security -- docker doesn't verify
  downloaded images
- a 64-bit Linux system
- lxc-docker version 1.3 or later

Build a docker image with catlfish. Note that you will have to cd into
this directory, catlfish/packaging/docker, in order for docker to find
the appropriate docker files.

    $ ./build.sh

Run the resulting image in interactive mode.

    $ docker run -it --rm catlfish /bin/bash

See catlfish/examples/docker-single-node/README for an example of how
to set up a single node catlfish instance.