prepare global validationpipe

server/src/main.ts

@@ -2,6 +2,7 @@ import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 import { DvbookingLoggerService } from './logger/dvbooking-logger.service';
 import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { ValidationPipe } from '@nestjs/common';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
@@ -18,6 +19,16 @@ async function bootstrap() {
   const document = SwaggerModule.createDocument(app, config);
   SwaggerModule.setup('api', app, document);
 
+  app.useGlobalPipes(
+    new ValidationPipe({
+      whitelist: true, // Strips away properties that do not have any decorators
+      transform: true, // Automatically transform payloads to be objects typed according to their DTO classes
+      transformOptions: {
+        enableImplicitConversion: true, // Allows class-transformer to convert string primitives to their target types
+      },
+    }),
+  );
+
   await app.listen(process.env.PORT ?? 3000);
 }
 bootstrap();