@pdblood thanks for telling us that, we are currently working on a website update. see here: bioboxes/rfc#203 . We will fix the links as soon as possible.
Regarding BioContainers I would say that it is a great effort for integrating bioinformatic tools in docker images. In my opinion it has not the same goal as bioboxes. Bioboxes aim is to make bioinformatic software interchangeable and by doing that making it easier using multiple containers or images of one type (assemblers/profilers and so on).