Document how the knowledge graph can be instantiated

[stain]

Using Apache Jena Fuseki might be one easy way through containers:

docker run --name workflowhub-fuseki -p 3030:3030 --volume /fuseki stain/jena-fuseki

See documentation on https://github.com/stain/jena-docker/pkgs/container/jena-fuseki

In theory my image of Fuseki there can also load up a turtle file on demand, but something has changed so the load.sh as I had documented it back then, it does not work as documented. I think this is because Fuseki has changed from TDB1 to TDB2 as backend, or it may be just an empty folder missing?

Alternatively we can just document by screenshot how you do "Upload data" in fuseki after starting it on 3030. Or try a different backend.