Post presents how to set up simple Ruby on Rails application, build/run Docker image and push/pull it to/from Docker Hub repository. You will find also details how to run Nginx and Rails application in 3 configurations: in separate containers, in single containers and Rails app in container with Nginx running on host. Rails: 5.0.0 Ruby: 2.3.1 Nginx: 1.10.0 Ubuntu 16.04 Xenial Docker: 1.12.3 Introd