While the general idea presented here is solid. It's a terrible idea to deploy your apps using the latest tag. It completely obliterates marathons ability to ro

While the general idea presented here is solid. It's a terrible idea to deploy your apps using the latest tag. It completely obliterates marathons ability to rollback should something go terribly wrong. It would be better to use the CIRCLE_BUILD_NUM they expose as an ENV var to tag the image and deploy that via Marathon.