index_controller.js

// medium_example_app/controllers/index_controller.js
// import your helpers/middleware/models here

export default function (router) {
  router.use(/* controller specific middleware goes here */);

  router.get('/', (req, res) => {
    // call model methods to get JSON from db
    let data = {data: 'hello world'};
    res.json(data);
  });
}