Update Dockerfile to use phantomjs 2.1.1
Update Dockerfile to use phantomjs 2.1.1

not-in-california/phantom-of-the-capitol,not-in-california/phantom-of-the-capitol,resistbot/phantom-of-the-capitol,resistbot/phantom-of-the-capitol,resistbot/phantom-of-the-capitol,resistbot/phantom-of-the-capitol,not-in-california/phantom-of-the-capitol,not-in-california/phantom-of-the-capitol