What is middleware?

In simple terms, middleware is a piece of code that runs before your application runs. It can be used to perform various tasks like authentication, error handling, logging, etc. It can also help to optimize the performance of an application by caching data, compressing responses, or distributing load across multiple servers, although those are more advanced use-cases. It's a great way to keep your code clean and organized.

Middleware is a concept that is used in many frameworks, and they have different ways of implementing it. Gozen's implementation is based on the concept of middleware stacks. A middleware stack is a list of middleware that are executed in a specific order. The order is important because each middleware can perform a task and pass the request to the next middleware in the stack.