Congratulations! You should now have a solid understanding of what dependency injection is, its benefits and potential drawbacks, and various implementation methods. You also successfully applied DI in a real-world Go application using the powerful Dig toolkit. Using Dig, you were able to effectively manage dependencies, improve modularity, and enhance the testability of your codebase.

In part two of this series, you'll explore practical applications of DI in Go using Wire and Fx.