Added empty line before changes

docs/hellonode.md

@@ -103,6 +103,7 @@ Visit your app in the browser, or use `curl` or `wget` if you’d like :
 $ curl http://localhost:8080
 Hello World!
 ```
+
 **If you get a `Connection refused` message, your `DOCKER_HOST` address may be the address of your Docker VM, not the localhost address.** Use the `docker-machine ip default` command to find the Docker VM address.
 
 ```shell