server/config.js
require('dotenv').config({ path: require('path').resolve(__dirname, '../.env') }); // eslint-disable-line global-require
export const NODE_ENV = process.env.NODE_ENV ? process.env.NODE_ENV.toLowerCase() : 'development';
export const IS_DEV = NODE_ENV === 'development';
export const IS_PROD = NODE_ENV === 'production';
export const IS_TEST = NODE_ENV === 'test';
export const PORT = process.env.PORT ? parseInt(process.env.PORT, 10) : 3000;