Configuring using class-based settings

An interesting way of laying out configurations for different deployment modes, such as production, testing, staging, and so on, can be cleanly done using the inheritance pattern of classes. As your project gets bigger, you can have different deployment modes, such as development, staging, production, and so on, where each mode can have several different configuration settings, or some settings that will remain the same. In this recipe, we will learn how to use class-based settings to achieve such a pattern.