Docker without Dockerfile: Build a Ruby on Rails application image in 5 minutes with Cloud Native Buildpacks (CNB)

At the end of this tutorial, you’ll have a working OCI image of a Ruby on Rails application that can run locally. You will learn about the Cloud Native Buildpack (CNB) ecosystem, and how to utilize the pack CLI to build images without the need to write or maintain a Dockerfile. This post is extracted from a tutorial I wrote for Heroku Cloud Native Buildpacks. Future revisions will be updated on the GitHub repo. Install the pack CLI We assume you have docker installed and a working copy of git. N...