Implement multi-threaded UDP server with port assignment

app/src/main/java/clientserver/App.java

@@ -8,7 +8,7 @@ public class App {
 
     public static void main(String[] args) {
         System.out.println(new App().getGreeting());
-
-        MistralDirectAPI.main(new String[] {});
+        ClientHandler.main(new String[] {});
+        // MistralDirectAPI.main(new String[] {});
     }
 }