Replace incorrect command in Node.js Client ReadMe
# Node.js client example
Run this example with the following command:
-`./scripts/docker_run ./scripts/run_server -e hello_world -c nodejs`
+`./scripts/docker_run ./scripts/run_example -e hello_world -c nodejs`
If everything works smoothly, you should then find `HELLO Node.js!` logged to
the console, alongside logs from the Oak application.
