In the previous chapters, we introduced that Egg is implemented based on Koa, so the middleware form in Egg is the same as in Koa, both based on the onion ring model. Every time we write a middleware, it is equivalent to adding an outer layer to the onion.
Original document address: Middleware
In the quick start, you should have gained a preliminary impression of the framework. Next, let's briefly understand the directory convention specifications.
Original document address: Directory Structure
A Web application itself should be stateless and have the ability to set itself according to the runtime environment.
Original document address: Runtime Environment