Express: How to pass app-instance to routes from a different file?

Question

I want to split up my routes into different files, where one file contains all routes and the other one the corresponding actions. I currently have a solution to achieve thi

Answer 1

For database separate out Data Access Service that will do all DB work with simple API and avoid shared state.

Separating routes.setup looks like overhead. I would prefer to place a configuration based routing instead. And configure routes in .json or with annotations.