I just recently wrote two articles on the subject of Dependency Injection. I recommend reading them:

- https://medium.com/@ktretiak/nestjs-vs-ditsmod-di-features-for-interceptors-guards-pipes-and-filters-7eb99769f4c6

- https://medium.com/@ktretiak/nestjs-vs-ditsmod-auto-validation-de5d2dc3c344