%%IMAGE%%:<version>-fpmThis variant contains PHP-FPM, which is a FastCGI implementation for PHP. See the PHP-FPM website for more information about PHP-FPM.
In order to use this image variant, some kind of reverse proxy (such as NGINX, Apache, or other tool which speaks the FastCGI protocol) will be required.
Some potentially helpful resources:
WARNING: the FastCGI protocol is inherently trusting, and thus extremely insecure to expose outside of a private container network -- unless you know exactly what you are doing (and are willing to accept the extreme risk), do not use Docker's --publish (-p) flag with this image variant.