This is a docker image for YSlow based on PhantomJS. See http://yslow.org/phantomjs/
This docker container contains a flexible ENTRYPOINT.
One can call a shortcut version or a longer version with al parameters. Later one is particularly useful for CI pipelines.
$ docker run tmaier/yslow --cdns "fonts.googleapis.com" www.example.com$ docker run tmaier/yslow:latest phantomjs yslow.js --info grade --format tap --cdns "fonts.googleapis.com" --threshold '{"overall": "B", "ycdn": 65}' www.example.com