feat: add backend-mock app

apps/backend-mock/src/core/pipe/params.pipe.ts

@@ -0,0 +1,27 @@
+import {
+  BadRequestException,
+  HttpStatus,
+  ValidationPipe,
+  type ValidationPipeOptions,
+} from '@nestjs/common';
+
+class ParamsValidationPipe extends ValidationPipe {
+  constructor(options: ValidationPipeOptions = {}) {
+    super({
+      errorHttpStatusCode: HttpStatus.BAD_REQUEST,
+      exceptionFactory: (errors) => {
+        const message = Object.values(errors[0].constraints)[0];
+        return new BadRequestException({
+          message,
+          status: HttpStatus.BAD_REQUEST,
+        });
+      },
+      forbidNonWhitelisted: true,
+      transform: true,
+      whitelist: true,
+      ...options,
+    });
+  }
+}
+
+export { ParamsValidationPipe };