An example docker container that packages an R script that does streaming newline delimited JSON transformation.
docker pull maxogden/docker-r-transform
transform.r adds "hello_from": "R" to every JSON object that gets piped in.
The Dockerfile handles installing R dependencies, and setting the entrypoint.
You can run this as a unix pipe like this:
$ echo '{"foo": "bar"}' | docker run -i maxogden/docker-r-transform
{ "foo": "bar","hello_from": "R" }