A:
Typical packages include:
- express-session (to manage session creation, persistence, cookie settings)
- A session store (in-memory is default but not production-safe; e.g. connect-redis, connect-mongo, or another external store)
- Body parsing middleware (e.g. body-parser) to parse req.body for login credentials
- A view/template engine (the blog uses Jade / Pug) or static HTML to render login/signup forms
- Middleware to enforce authentication (a “checkLogin” function)
The blog’s example scaffolds these in index.js and defines routes for signup, login, welcome page, and logout.
