Pushes all images built with build-image. This requires a --prefix
option to be specified since that is the user (or organization) to
which we push and helps to identify the local images.
Change-Id: I13eee575c329deb58285f9cc913be298b43bb438
All OpenStack pbr packages can be turned in to single-process docker
containers the same way. bindep files describe the distro-packages
needed. requirements.txt describe the requirements and setup.cfg lists
the programs that get installed.
Occasionally, like with zuul-executor from Zuul, there are depends that
don't quite fit the mold, so allow a final-stage Dockerfile override.
This uses python:slim as a base image and does not make that
configurable. That is because these are python programs, so making
containers for different base distros doesn't make any sense.
Andreas Jaeger