Ubuntu 14.04 i386 Build
Docker hub doesn't publish 32-bit Ubuntu builds, so this sets up a Docker Automated Build to create our own.
To build the image, merely invoke docker as follows:
docker build .
Refreshing the tarball
To build the tarball that is referenced in the
Dockerfile we use Vagrant to build up a Debian VM that can run through docker's
mkimage-debootstrap steps. Here's how that's done:
vagrant up vagrant ssh cd /vagrant sudo ./make-docker-image.sh exit vagrant -f destroy
This will dump the tarball back in this directory where it can then be used to build the docker image as described above.