• Express 공식 홈페이지: http://expressjs.com

• 퍼그 공식 홈페이지: https://pugjs.org

• 넌적스 공식 홈페이지: https://mozilla.github.io/nunjucks

• morgan: https://github.com/expressjs/morgan

• body-parser: https://github.com/expressjs/body-parser

• cookie-parser: https://github.com/expressjs/cookie-parser

• static: https://github.com/expressjs/serve-static

• express-session: https://github.com/expressjs/session

• multer: https://github.com/expressjs/multer

• dotenv: https://github.com/motdotla/dotenv