Configure node environment

config.js

/*
* From The complete nodejs developer course 2 https://www.udemy.com/the-complete-nodejs-developer-course-2/learn/v4/overview
*/
var env = process.env.NODE_ENV || "development";

if(env==="development" || env==="test") {
	var config = require('./config.json');
	var envConfig = config[env];

	Object.keys(envConfig).forEach((key) => {
		process.env[key] = envConfig[key];
	});
}