Add OAuth 2.0 to a Node.js CRUD app

In this continuation of a series on building a CRUD app in Node.js, the focus is on enhancing the original vinyl record cataloging application by integrating more production-ready features using the ngrok JavaScript SDK. The app, initially constructed with a REST API via Express and a React.js frontend, stores data in a MongoDB database and was previously made accessible online through the ngrok agent CLI. This tutorial guides users in refactoring the setup to serve the frontend from the same Node process running the backend and introduces OAuth for secure user authentication and authorization, specifically using Google's implementation. By leveraging ngrok's SDK, developers can define a static domain for the application, thereby establishing a stable ingress point essential for OAuth security, and learn to create sessions and listeners for HTTP endpoints. The tutorial also covers best practices for managing Node.js application processes, such as implementing a graceful kill switch to ensure clean termination of the application. Overall, these enhancements aim to make the application more robust and suitable for a production environment.

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