It is not uncommon for back-end software to have a configuration file to start up with. These are generally YAML or JSON files, which are loaded by the system while starting up, and are then used to set up initial configuration for a system. Values included here may affect business logic or infrastructure.

Let us create a new service called DumplingSale (because I love dumplings, or as we call them, momos). This service is used for managing the sales of dumplings.