Remove hardcoded reference to container name "docker"

run-postgis-docker.sh

@@ -80,7 +80,7 @@ eval $CMD
 
 docker ps | grep ${CONTAINER_NAME}
 
-IPADDRESS=`docker inspect postgis | grep IPAddress | grep -o '[0-9\.]*'`
+IPADDRESS=`docker inspect ${CONTAINER_NAME} | grep IPAddress | grep -o '[0-9\.]*'`
 
 echo "Connect using:"
 echo "psql -l -p 5432 -h $IPADDRESS -U $PGUSER"