Task LSMR-102: Hint at interactive docker run to allow ^C

SAS/LSMR/docker/README

@@ -5,8 +5,10 @@ To build:
 
 To start the PostgreSQL container:
 
-	docker run --name=postgres-$USER --rm lsmr-postgres
+	docker run [-it] --name=postgres-$USER --rm lsmr-postgres
 
 To start the LSMR container (exposing port 8001 to surf to):
 
-	docker run --rm -p 0.0.0.0:8001:8000 --link=postgres-$USER:postgres lsmr
+	docker run [-it] --rm -p 0.0.0.0:8001:8000 --link=postgres-$USER:postgres lsmr
+
+Note: "-it" allows one to abort the container with ^C.