as of 2017-09-18, this looks like it is failing from DockerHub, but working from GitHub.
docker pull rocker/rstudio-daily will build an image using rstudio-server version 1.1.267, where installing from the GitHub repo directly (i.e. clone the report and from it running
docker builld . installs rstudio-server version 1.1.370.
The error I get from the install is
Reading package lists... E: The value 'stable' is invalid for APT::Default-Release as such a release is not available in the sources The command '/bin/sh -c apt-get update && apt-get install -t stable libssl1.0.0 && apt-get install -y -t unstable --no-install-recommends ca-certificates file git libapparmor1 libedit2 libcurl4-openssl-dev lsb-release psmisc python-setuptools sudo' returned a non-zero code: 100