The submission is about https://github.com/apple/containerization, not https://github.com/apple/container.
The former is for apps to ship with container sidecars (and cooler news IMO); the latter is 'I am a developer and I want to `docker run ...`'.
(Oh, and container has a submission here: https://news.ycombinator.com/item?id=44229239)
The former is the framework enabling Linux containers on lightweight VMs and the latter is a tool using that framework.