This is a very basic base image for Rails applications.
It can also be used as a dockerized rails cli. For example by running:
docker run --rm -w /app --v $PWD:/app emud/ruby-on-rails rails new MyApp
If you're gonna do that frequently, consider creating an alias for it.
For installing node the image uses nvm. It installs the current LTS (6.11.0 at the moment of writing).
Releasing alternate versions with other node versions is not discarded. Please fill an issue if you want to request it.
The image uses the "standard" version of Ruby 2.4 image. Releasing alternate alpine versions is not discarded. Please fill an issue if you want to request it.