Using nconf to manage hierarchical configuration

config.js

/**
* Using nconf to manage hierarchical configuration
 * https://www.npmjs.com/package/nconf
 */

'use strict';

var nconf = require('nconf');

var config = {
    mongodb: {
      db_name: 'example-api',
      db_host: 'localhost',
      db_user: '',
      db_pw: '',
      db_port: 27017
    },
    http: {
      server_name: 'Example',
      host: 'localhost',
      http_port: 3000,
      cookie_secret: 'longandhardtoguess'
    },
    google: {
      browser_key: 'key_from_google',
      server_key: 'key_from_google'
    }

  };


// step down the hierarchy - use a local settings file but don't included it in the git repos
nconf
  .argv()
  .env()
  .file({ file: process.env.NODE_ENV + '.json' })
  .file({ file: './local.json' });
  
  
nconf.defaults(config);

module.exports = nconf.get();