Thanks a lot for this! actix-web is an amazing framework so far. I've started with the book zero2prod in rust, and using some type driven designed, rust's error

Thanks a lot for this! actix-web is an amazing framework so far. I've started with the book zero2prod in rust, and using some type driven designed, rust's errors handling, actix-web's extractors and web::data feels like super good ergonomics. I do feel like the docs could be expanded a bit more, I got stuck when trying to write a middleware for example. Congrats for the release!