This image starts Apache 2.4 from the IUS repository (2.4.37) using the environment variables from /etc/sysconfig/httpd. Configuration files should be mounted to /etc/httpd/conf.d.
The version tagged 5.6 runs PHP 5.6, 7.0 refers to PHP 7.0 and the tags 7.1 and latest are used for PHP 7.1. Make sure, that you choose the right version of PHP for your application.
docker run -d -p 80:80 -p 443:443 \
-v /srv/docker/apache/etc/httpd/conf.d/www.conf:/etc/httpd/conf.d/www.conf \
-v /srv/docker/apache/var/www:/var/www \
registry.ott-consult.de/oc/apache-php:latest