Expanded on experimenting with grpc server
diff --git a/Makefile b/Makefile
index b0455d3..a85f749 100644
--- a/Makefile
+++ b/Makefile
@@ -91,6 +91,7 @@
 	docker pull consul:latest
 	docker pull fluent/fluentd:latest
 	docker pull gliderlabs/registrator:latest
+	docker pull ubuntu:xenial
 
 purge-venv:
 	rm -fr ${VENVDIR}