Change Details

Currently, Docker Hub build process isn't optimized to minimize build: if 5 commits modify a base image, 5 images of the base images will be build, triggering 5 rebuilds of each of our images depending of them. That gives sometimes a little flood on #nasqueron-ops. Instead we offer to cache the information and output every 30 minutes a summary like: `New images pushed to Docker Hub: nasqueron/aphlict (12x), nasqueron/rabbitmqadmin (4x)`