It'll be interesting to see the differences from other systems in this space (OpenShift, Deis Workflow). From the samples it appears to be more of a "pull code from github and push to Dockerhub" model than a "push code to the platform and push to an internal registry" that other PaaSes target.
https://docs.openshift.com/container-platform/3.3/install_co...
https://deis.com/docs/workflow/understanding-workflow/archit...
disclaimer: I was one of the core maintainers of Deis Workflow.