utils/mongoose.js

const mongoose = require('mongoose');

module.exports = {
    init: () => {
        mongoose.connect(process.env.MONGO_URL).catch(err => console.log(err.reason));

        mongoose.Promise = global.Promise;

        mongoose.connection.on('connected', () => {
            console.log('\nMongoose connection successfully opened');
        });

        mongoose.connection.on('err', err => {
            console.error(`Mongoose connection Error\n ${err.stack}`);
        });

        mongoose.connection.on('disconnected', () => {
            console.log('Mongoose connection disconnected');
        });
    }
};