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#"
ENDPOINT,GRAPH_STORE,ONTOLOGYetc.ENVparams would be better as image command arguments, e.g.