After asking ChatGPT in this post. I did continue to explore the answer. And here is what I got :
here are some more specific advanced topics to consider when learning backend development with NestJS and MySQL:
Authentication and authorization: Learn how to implement authentication and authorization in your NestJS application. NestJS provides built-in support for Passport, a popular authentication middleware for Node.js. You can also use NestJS Guards to implement authorization and access control.
Caching: Learn how to use caching to improve the performance of your application. NestJS provides built-in support for caching using Redis or other caching providers.
Error handling: Learn how to handle errors effectively in your NestJS application. NestJS provides built-in support for exception filters, which allow you to catch and handle exceptions in a centralized way.
Testing: Learn how to write automated tests for your NestJS application. NestJS provides built-in support for testing using Jest, a popular testing framework for Node.js.
Deployment: Learn how to deploy your NestJS application to a production environment. NestJS is designed to be easily deployable to cloud platforms such as Heroku or AWS, but you'll need to learn how to configure and deploy your application effectively.
Performance optimization: Learn how to optimize the performance of your NestJS application. This might include techniques such as query optimization, caching, and load balancing.
Scalability: Learn how to design your NestJS application for scalability. This might include techniques such as distributed databases, load balancing, and horizontal scaling.
That is our session. And it reminds me that these topics can be complex and may require a lot of experimentation and practice to master. I just have to dive in and try new things, and always be willing to learn and adapt.