Simple, multi environment config with Node.js

app.js

// app.js
var config = require("config/app");

console.log(config.dbProvider);

config-app.js

// config/app.js
var defaultConfig = {
  googleAnalyticsId: "dummy"
};
var _ = require('lodash');
module.exports = _.merge(defaultConfig, require("./" + process.env.NODE_ENV))

config-envs-development.js

// config/envs/development.js
module.exports = {
  dbProvider: 'sqlite3'
};

config-envs-production.js

// config/envs/production.js
module.exports = {
  dbProvider: 'pg',
  googleAnalyticsId: "1234567"
};