nunu Ghost installations on our platform come bundled with a newer version of Node.
If you're using the start and stop scripts that were included with the app then the newer Node is used automatically.
If you're running ghost commands directly then you'll need to set your shell PATH to pick up the newer Node before you run any node/ghost commands.
To do so, run the following command:
export PATH=$HOME/apps/name_of_app/node/bin:$PATH
Hope this helps 🙂