Don't uselessly copy files

[danieljkemp]

Currently a check is made against version.php to see if if the current container is newer than the installed version, and if not, application files are copied into a volume. This is inefficient, and bad practice.

In the case of running the apache version, there is no reason to do this; it only serves to waste space on the volume store, and slow install/upgrade times.

In the case of running the fpm version, this is still a hack; files required by the nginix/lighttpd servers should be copied in manually (replicate the old behavior in an init container), or via docker's behavior when mounting a volume on a directory. The better solution would be to create a new image that runs a pre-configured/configurable nginx bassed off of this image -- any required configs could then be shared in a volume.

[alallier]

Related to #340