Something happened a little while ago which we did not have time to commensurate properly. Our Rocker image for R is now the official R image for Docker itself. So getting R (via Docker) is now as simple as saying
docker pull r-base.
This particular container is essentially just the standard r-base Debian package for R (which is one of a few I maintain there) plus a mininal set of extras. This
r-base forms the basis of our other containers as e.g. the rather popular
r-studio container wrapping the excellent RStudio Server.
Docker itself continues to make great strides, and it has been great fun help to help along. With this post I achieved another goal: blog about Docker with an image not containing shipping containers. Just kidding.