You can check how it works with the following site.

https://jo-pp-node-demo.herokuapp.com/

How to run

1. Set the following environment variables (export PP_..=..).

• PP_API_APP_REST: Your REST app client id
• PP_API_APP_REST_SEC: Your REST app secret
• PP_PROD: true for Live, empty or unset for Sandbox

2. Run npm install & npm start