In order to match ownCloud's Docker images, we need to provide -apache
and -fpm variant images as well as maintaining version tags for older
images.
These scripts are improved versions of the ownCloud scripts[1] because
they also automatically generate the directories with each ./update.sh,
and also generate all aliases without needing human intervention.
[1]: https://github.com/docker-library/owncloud/blob/master/generate-stackbrew-library.sh
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>