The Universal Recommender engine template was copied and pre-built into this docker image. The image is built on top of the pjvdwest/pio_base image that contains all the PredictionIO infrastructure.
If this image is run (as a daemon) then it will execute a run.sh script that will start all PIO services, build the engine (but since the engine is pre-built, it will take mere moments), create an app key and train the engine.
A deployment of PIO is done as the last step.
The full PredictionIO service should be accessible at port 8000.