Update frontend

src/main/java/ru/serega6531/packmate/controller/PatternController.java

@@ -56,7 +56,6 @@ public class PatternController {
     @PostMapping
     public PatternDto addPattern(@RequestBody PatternCreateDto dto) {
         return service.create(dto);
-
     }
 
     @PostMapping("/{id}")

src/main/java/ru/serega6531/packmate/service/ServicesService.java

@@ -90,6 +90,10 @@ public class ServicesService {
 
     @Transactional
     public ServiceDto create(ServiceCreateDto dto) {
+        if (repository.existsById(dto.getPort())) {
+            throw new IllegalArgumentException("Service already exists");
+        }
+
         CtfService service = fromDto(dto);
 
         log.info("Added service '{}' at port {}", service.getName(), service.getPort());