rocker/binder contains some Jupyter things, but the rocker project
as a whole is not focused on Jupyter. This links them out to the
jupyter/docker-stacks project, which is more Jupyter focused to
serve users who are looking for more Jupyter focused container images.
I think a lot of communities / users use a combination of Python (from
various sources) and R (from the rocker project) already anyway.

I link to the rocker project from jupyter/docker-stacks since
last month (jupyter/docker-stacks#2065),
and one of the maintainers asked if I could provide a link
back as well.