Building Rails Applications in Docker

Docker images can provide a powerful interface for deploying your Rails applications. Everything your application needs in order to run can be packaged inside a Docker image. The Docker images can then be deployed from your laptop, staging and to production. This greatly increases the parity between your development and production environments when making a Rails application.However, always needing to create a Docker image just to test your code can be time consuming if you’re not careful. Consider the following Ruby application:.