docs(readme): update recommend server frameworks (hyperium#3232)

Suggest Axum first, and mention that warp uses a functional paradigm.

Closes hyperium#3222

README.md

@@ -18,6 +18,16 @@ Note: We do not yet support SSL / TLS connections in hyper_wasi yet.
 
 **Get started** by looking over the [guides](https://hyper.rs/guides/1/).
 
+## "Low-level"
+
+hyper is a relatively low-level library, meant to be a building block for
+libraries and applications.
+
+If you are looking for a convenient HTTP client, then you may wish to consider
+[reqwest](https://github.com/seanmonstar/reqwest).
+If you are not sure what HTTP server to choose, then you may want to consider [axum](https://github.com/tokio-rs/axum) or [warp](https://github.com/seanmonstar/warp), the latter taking a more functional approach.
+Both are built on top of this library.
+
 ## Contributing
 
 To get involved, take a look at [CONTRIBUTING](CONTRIBUTING.md).