add error check for request

Signed-off-by: Peter Siegmund <developer@mars3142.org>

src/main/java/dev/mars3142/fhq/timezone_service/timezone/service/impl/TimezoneServiceImpl.java

@@ -52,6 +52,9 @@ public class TimezoneServiceImpl implements TimezoneService {
           .get()
           .uri("https://worldtimeapi.org/api/ip/" + ip)
           .retrieve()
+          .onStatus(HttpStatusCode::is4xxClientError, (request, response) -> {
+            throw new NotFoundException();
+          })
           .body(WorldTimeApiIpResponse.class);
   }