Config derivation with ZIO config and Magnolia.

As software engineers, we are constantly looking for ways to build faster, more scalable, and more efficient systems. But we often overlook one critical aspect: sustainability. Just as in sports, where long-term success comes from balancing peak performance with endurance, sustainable software engineering is about creating systems that not only perform well today but also remain viable and efficient in the future.

AssertJ already provides many useful assertions for all kind of types. But sometimes we want to define our own assertions for our own types. We can define new assertions by extending the AbstractAssert class In this class we add methods that will check the values of our type. The names of the methods can reflect the domain model of our type. This can make our tests more readable and understandable.