VOL-2124 - add build target to makefile

Change-Id: I4c538dee9c15e914d93092c716d2fc21e3164a3c
diff --git a/Makefile b/Makefile
index edca893..87c8621 100644
--- a/Makefile
+++ b/Makefile
@@ -62,6 +62,7 @@
 	@echo ""
 	@echo "clean             : Removes any local filesystem artifacts generated by a build"
 	@echo "distclean         : Removes any local filesystem artifacts generated by a build or test run"
+	@echo "build             : Build all openolt adapter artifacts"
 	@echo "docker-build      : Build openolt adapter docker image"
 	@echo "docker-push       : Push the docker images to an external repository"
 	@echo "help              : Print this help"
@@ -95,6 +96,8 @@
 
 ## Docker targets
 
+build: docker-build
+
 docker-build: local-protos local-voltha
 	docker build $(DOCKER_BUILD_ARGS) -t ${ADAPTER_IMAGENAME} -f docker/Dockerfile.openolt .