Revert "Remove envoy in make build target"

This reverts commit 0059533dd5ae99488c0f97dc47c6673bf110b3a7.

Change-Id: Id41f803a89eb3b449c33028f81ef1960c1bff45c
diff --git a/Makefile b/Makefile
index e6f69de..f640ab8 100644
--- a/Makefile
+++ b/Makefile
@@ -235,7 +235,7 @@
 
 prod-containers: base voltha ofagent netconf shovel onos dashd cli grafana consul tools envoy fluentd unum j2
 
-containers: base voltha ofagent netconf shovel onos tester config-push dashd cli portainer grafana nginx consul tools fluentd unum ponsim j2 alarm-generator test_runner
+containers: base voltha ofagent netconf shovel onos tester config-push dashd cli portainer grafana nginx consul tools envoy fluentd unum ponsim j2 alarm-generator test_runner
 
 base:
 	docker build $(DOCKER_BUILD_ARGS) -t ${REGISTRY}${REPOSITORY}voltha-base:${TAG} -f docker/Dockerfile.base .