Instructions updated

README.md

@@ -93,7 +93,8 @@ docker-compose down -v
 If you want to update carputilsGUI and the underlying examples, stop the containers and delete the *nginx* and *carputilsgui_web_server* images. Then, pull the updates and restart the containers.
 ````
 docker-compose down -v
-docker rmi carputilsgui_web_server nginx
+docker rmi carputilsgui_web_server
+docker rmi carputilsgui_app
 git pull
 docker-compose up
 ````