devconnector_2.0 is a full-stack MERN example application that demonstrates how to build a social network for developers from scratch. The backend uses Node.js and Express with JWT-based authentication and MongoDB for persistence, modeling users, profiles, posts, and comments. The frontend is a React app that implements routing, protected pages, Redux-style state management, and UI flows such as registration, login, profile creation, and post feeds. It shows end-to-end patterns like form handling, API consumption, error handling, alerts, and deployment-ready configuration. ...