Refactor authentication and carousel services; enhance error handling and validation

src/main.ts

@@ -20,7 +20,12 @@ async function bootstrap() {
     prefix: '/public/',
   });
 
+  
   app.enableCors();
   await app.listen(AppModule.port);
+
+  const port = AppModule.port;
+  console.log(`Documentacion disponible en: http://localhost:${port}/api`);
+  console.log(`Servidor desplegado en: http://localhost:${port}`);
 }
 bootstrap();