Add RELEASE_VERSION into docker build arg (#373)

Author: Daniel-Fan

Makefile

@@ -216,7 +216,7 @@ e2e-test: ## Run e2e test
 build-operator-image: $(CONFIG_DOCKER_TARGET) ## Build the operator image.
 	@echo "Building the $(OPERATOR_IMAGE_NAME) docker image for $(LOCAL_ARCH)..."
 	@docker build -t $(OPERATOR_IMAGE_NAME)-$(LOCAL_ARCH):$(VERSION) \
-	--build-arg VCS_REF=$(VCS_REF) --build-arg VCS_URL=$(VCS_URL) \
+	--build-arg VCS_REF=$(VCS_REF) --build-arg VCS_URL=$(VCS_URL) --build-arg RELEASE_VERSION=$(RELEASE_VERSION) \
 	--build-arg GOARCH=$(LOCAL_ARCH) -f Dockerfile .
 
 ##@ Release