* add docker information
introduce virtualization section
Merge branch 'gh-pages' of https://github.com/codeguy/php-the-right-way into docker
fixing filenames
minor text improvements
fixed typo
Adding some more information and a link list to the Docker section
Merge pull request #453 from maglnet/docker

add docker information / introduce virtualisation section
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages