PhantomJS image built from sources (2.0.0) on Ubuntu 14.04.
This version also has Ruby 2.2.3 Installed on it too...
The image can be found in the MM docker registry (https://registry.mergermarket.it/phantomjs2/).
docker pull registry.mergermarket.it/phantomjs2:latest
You may run it on the command line:
docker run -t ≈ phantomjs --version
But you'll probably want to use it as a base image:
FROM registry.mergermarket.it/phantomjs2:latest