better unauthorized ip, and adding responder

src/main.rs

@@ -3,7 +3,7 @@ use hyper::{
     body::{Bytes, Incoming},
     Request, Response,
 };
-use servme::Server;
+use servme::{Responder, Server};
 use std::convert::Infallible;
 
 #[tokio::main]
@@ -16,8 +16,5 @@ async fn main() {
 }
 
 async fn handler(req: Request<Incoming>) -> Result<Response<Full<Bytes>>, Infallible> {
-    Ok(Response::new(Full::new(Bytes::from(format!(
-        "Hello World! {}",
-        req.uri()
-    )))))
+    Responder::text(format!("Hello World! {}", req.uri()))
 }