Codeminer42 Ruby Image for CI builds

Docker Ruby images used by Gitlab CI.

Dependencies

The following dependencies are being installed on all images:

• Node.js v6.11.1 and npm
• PhantomJS v2.1.1
• Qt v5 and Xvbf (only on CRuby images)
• Chrome Webdriver (latest stable)

Tags

We currently have images for the following Rubies.

CRuby images

• 2.4, latest Dockerfile
• 2.3 Dockerfile
• 2.2 Dockerfile
• 2.1 Dockerfile

JRuby images

• 9.1-jruby Dockerfile

Contributing

Dockerfiles are stored under folders for each version.

For updating the images, just open a pull request with the new Dockerfile version and, after accepted, Docker Hub will build automatically after a few minutes.

The images should setup an environment that is widely used, please don't install dependencies that are specific to a project. It's also good to have a pattern and all images support the same things, why a ruby version would use PhantomJS and the other doesn't?