ISSUE-7 - Hotfix of issue-7 from upstream repository.

Fix for Mac OS users using boot2docker and nginx-php. The sock file was stored into the data volume container and a mount of it using the host-system results a crash of the php-fpm service, cause sock file cannot written (Php Exit Code 78).
This merge-request moves the sock-file into the /run directory of the container.
Please note, I only fixed it for the nginx-php configuration, I do not know if there could be a problem on other Dockerfiles inside the repo.