Startup config for Node JS app.

database.js

const mongoose = require("mongoose");

module.exports = function () {
  const result = mongoose.connect("mongodb://localhost/app", {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  });
  result
    .then((response) => {
      console.log("Connection Established" + response);
    })
    .catch((error) => {
      console.log("Failed to connect with error " + error);
    });
};

routes.js

const express = require("express");
const user = require("../routes/users");

module.exports = function (app) {
  app.use(express.json());
  app.use("/api/user", user);
};