I got the basic understanding of how nest works and how to develop a simple backend using it. However, now I am very interested to study more advanced, by building a project, and some example projects would come very useful in this process. Especially I am interested how people write their services, controllers, how they handle errors and how they write tests. Also how people structure the code, name vars and so on, clean code with solid principles

Currently I am working with a stack that includes
nest
posgresql
typeorm
automapper
typescript
openapi
express

Thanks

Most of examples I checked have very basic backend logic and describe the basics.

It would be great if I could find eny useful examples
github repos
youtube videos/ playlists
udemy courses
articles
books