This is the SDK used for apps to behave like they should. To change it in the backend, upload it to Buckets/shuffler.appspot.com/generated_apps/baseline.

If you want to update apps.. PS: downloads from docker hub do overrides.. :)

Write your code & check if runtime works
Build app_base image
docker rm $(docker ps -aq) # Remove all stopped containers
Delete the specific app's Docker image (docker rmi frikky/shuffle:...)
Rebuild the Docker image (click load in GUI?)