Getting Started with Docker and Ruby on Rails
Docker helps you isolate your app and its environment, removing dependency issues (“it works on my machine”), and allowing easy replication across environments, and scaling as your app grows.
In this tutorial, you’ll learn how to take a basic Rails app and prepare it for use in a Docker container (or “dockerise” it).
https://www.chrisblunt.com/rails-on-docker-getting-started-docker-ruby-rails/
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