Start RStudio when conda environment contains R packages

[xhochy]

Proposed change

If the user provides an environment.yml file that contains an R package, we should also start RStudio via jupyter_server_proxy. For the start, we could determine the usage of R by checking if any of the dependencies in the environment.yml contains an r- prefix.

Who would use this feature?

This would be used by people that install their R packages via conda as well as could it be an alternative to MRAN to get pinned versions for R packages.

How much effort will adding it take?

This needs a bit of refactoring to expose the install commands for RStudio separately from the RBuildPack. Otherwise, the work will be limited to testing the setup.

Who can do this work?

I happy to implement this incl. an example for binder.

[betatim]

This is super cool!