node js how to a background process express code example

Example 1: set up background process in express app

function populateDatabase() {
  //connect to streaming API
  //populate database
}

module.exports = populateDatabase;

Example 2: set up background process in express app

//app.js
var populateDatabase = require("./listen");
setInterval(60 * 1000, populateDatabase);
// rest of app setup/start code