Entrypoint command should be an array.
Entrypoint command should be an array.

pblittle/docker-logstash,ContinuumIO/docker-logstash,eternnoir/docker-logstash,awyrough/docker-logstash,TaylorMonacelli/docker-logstash-pblittle,ContinuumIO/docker-logstash,dant3/docker-logstash