Not that it's hard to set up an environment to test
this library in, but perhaps you just can't be bothered
to mess up your system installing software and versions
you don't otherwise need.
Build the image:
$ docker build -t minify .
Run the tests:
$ docker run --rm --name minify minify
Or if you plan on testing/changing the code and don't
want to rebuild the image, just load it as a volume:
$ docker run --rm --name minify -v ~/Sites/minify:/var/www minify
