server.js

import 'idempotent-babel-polyfill';
// import 'intersection-observer';
import BitScoop from 'bitscoop-sdk';
import config from 'config';
import express from 'express';
import mongodb from 'mongodb';
import { Nuxt, Builder } from 'nuxt';
import nuxtConfig from './nuxt.config.js';

const BITSCOOP_API_KEY = config.bitscoop.api_key;
const MONGODB_URI = config.mongodb.address;
const ICE_SERVERS = config.iceServers;
const LISTEN_PORT = config.listenPort;
const opts = {
	poolSize: 5
};

const bitscoop = new BitScoop(BITSCOOP_API_KEY, config.bitscoop.arguments);

const app = express();

const nuxt = new Nuxt(nuxtConfig);
const builder = new Builder(nuxt);

Promise.resolve()
	.then(async function() {
		let mongo = await new Promise(function(resolve, reject) {
			mongodb.MongoClient.connect(MONGODB_URI, opts, function(err, db) {
				if (err) {
					reject(err);
				}
				else {
					resolve(db);
				}
			});
		});

		global.env = {
			databases: {
				mongo: mongo
			},

			bitscoop: bitscoop,

			iceServers: ICE_SERVERS
		};

		// CORS
		app.use(function(req, res, next) {
			res.setHeader("Access-Control-Allow-Origin", "*");
			res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
			next();
		});

		builder.build();
		app.use(nuxt.render);
		app.listen(LISTEN_PORT, '0.0.0.0');

		console.log('Nuxt App listening on: ' + LISTEN_PORT); //eslint-disable-line no-console
	});