Fixed build tag error on make

clitools/makefile

@@ -73,6 +73,15 @@ clean:
 		$(BUILDINFO_FILE) \
 		$(OUT_DIR)/crds
 
+dockerclean:
+	@echo "Removing tagged images..."
+	- docker rmi \
+		localhost/monok8s/control-agent:$(VERSION) \
+		2>/dev/null || true
+
+	@echo "Removing dangling images..."
+	- docker image prune -f
+
 all: build build-agent build-local
 
 .PHONY: clean all run .buildinfo build build-local build-agent uboot-tools