The ModCloth Platform team has been building a Docker-based continuous delivery pipeline. This presentation discusses that project and how we build containers at ModCloth. The topics include what goes into our containers; how to optimize builds to use the Docker build cache effectively; useful development workflows (including using fig); and the key decision to treat containers as processes instead of mini-vms. This presentation will also discuss (and demo!) the workflow we’ve adopted for building containers and how we’ve integrated container builds with our CI.