Article on the work blog: https://medium.com/ibm-watson-data-lab/let-the-build-server-cf-push-1cb68341b6c4#.u9q8eo8bs. Please don’t run `cf push` from your machine (yes I know my tutorials tell you to) because it pushes your local filesystem. By using the build server, you only push what’s been committed to source control and presumably reviewed – and others can replicate your deploy.