Add Concurrency to Server

Source/Server.rs

@@ -9,7 +9,12 @@ async fn main() {
     loop {
         // The second item contains the IP and port of the new connection.
         let (socket, _) = listener.accept().await.unwrap();
-        process(socket).await;
+
+        // A new task is spawned for each inbound socket. The socket is
+        // moved to the new task and processed there.
+        tokio::spawn(async move {
+            process(socket).await;
+        });
     }
 }