I am fully unfamiliar to Mendix and wondering about possible ways to connect (or extend) Mendix app to the existing code written in NodeJS. Assuming some data have to be passed, for example, with REST API between Mendix app and existing code. Is there some tutorial or workshop on this topic with the best way to start? Is there a support for other languages, besides Java on the backend side? Are there any example of Java backends, somewhere in templates or other sources?