config.js

const nconf = require('nconf'),
    packageJson = require('./package.json');

// Setup nconf to use (in-order):
//   1. Overrides
//   2. Command-line arguments
//   3. Environment variables
//   4. Default values
nconf
    .overrides({
        'APP_NAME': 'rssCloudServer',
        'APP_VERSION': packageJson.version,
    })
    .argv()
    .env()
    .defaults({
        "DOMAIN": "localhost",
        "PORT": 5337,
        "MONGODB_URI": "mongodb://localhost:27017/rsscloud",
        "MAX_CONSECUTIVE_ERRORS": 3,
        "MAX_RESOURCE_SIZE": 256000,
        "CT_SECS_RESOURCE_EXPIRE": 90000,
        "MIN_SECS_BETWEEN_PINGS": 0,
        "REQUEST_TIMEOUT": 4000
    });

module.exports = {
    appName: nconf.get('APP_NAME'),
    appVersion: nconf.get('APP_VERSION'),
    domain: nconf.get('DOMAIN'),
    port: nconf.get('PORT'),
    mongodbUri: nconf.get('MONGODB_URI'),
    maxConsecutiveErrors: nconf.get('MAX_CONSECUTIVE_ERRORS'),
    maxResourceSize: nconf.get('MAX_RESOURCE_SIZE'),
    ctSecsResourceExpire: nconf.get('CT_SECS_RESOURCE_EXPIRE'),
    minSecsBetweenPings: nconf.get('MIN_SECS_BETWEEN_PINGS'),
    requestTimeout: nconf.get('REQUEST_TIMEOUT')
};