misskey/src/misc/environmentInfo.ts

import Logger from './logger';
import isRoot = require('is-root');

export default class {
	public static show(): void {
		const env = process.env.NODE_ENV;
		const logger = new Logger('Env');
		logger.info(typeof env == 'undefined' ? 'NODE_ENV is not set' : `NODE_ENV: ${env}`);

		if (env !== 'production') {
			logger.warn('The environment is not in production mode');
			logger.warn('Do not use for production purpose');
		}

		logger.info(`You ${isRoot() ? '' : 'do not '}have root privileges`);
	}
}