adds MESSENGER_TRANSPORT_DSN env var to dockerfile.
adds MESSENGER_TRANSPORT_DSN env var to dockerfile.

thecoolestguy/ilios,dartajax/ilios,dartajax/ilios,Trott/ilios,stopfstedt/ilios,Trott/ilios,thecoolestguy/ilios,stopfstedt/ilios,ilios/ilios,ilios/ilios