в webpack.config.js
switch (process.env.NODE_ENV) {
case 'prod':
case 'production':
module.exports = require('./config/webpack.prod');
break;
case 'test':
case 'testing':
module.exports = require('./config/webpack.test');
break;
case 'dev':
case 'development':
default:
module.exports = require('./config/webpack.dev');
}
и запускаешь с ключами.
