Docker image for SLING
docker build -t sling .
docker run -t sling
docker-compose build to build the image (takes a while, since sling is compiling)
docker-compose run sling bash to switch to console within the container
Adapt mounts in docker-compose if needed (lots of diskspace required)
Run docker-compose run sling bash (after building the image), and execute the following scripts
following https://github.com/google/sling/blob/caspar/doc/guide/wikiflow.md