Docker command arguments

[namedgraph]

ENDPOINT, GRAPH_STORE, ONTOLOGY etc. ENV params would be better as image command arguments, e.g.

docker run ... atomgraph/processor
  --endpoint="https://query.wikidata.org/bigdata/namespace/wdq/sparql"
  --graph-store="https://query.wikidata.org/bigdata/namespace/wdq/service"
  --ontology="https://github.com/AtomGraph/Processor/blob/develop/examples/wikidata#"