graceful shutdown and clean up of server after 5 requests

src/main.rs

@@ -11,7 +11,7 @@ fn main() {
     let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
     let pool = ThreadPool::new(4);
 
-    for stream in listener.incoming().take(2) {
+    for stream in listener.incoming().take(5) {
         let stream = stream.unwrap();
 
         pool.execute(|| {