feat: 优化项目目录结构

apps/backend/src/main.ts

@@ -0,0 +1,31 @@
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+import { BadRequestException, ValidationPipe } from '@nestjs/common';
+import { ResponseInterceptor } from './common/interceptors/response.interceptor';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  app.useGlobalPipes(
+    new ValidationPipe({
+      transform: true,
+      whitelist: true,
+      forbidNonWhitelisted: true,
+      stopAtFirstError: true,
+      exceptionFactory: (errors) => {
+        const error = errors[0];
+        const firstConstraint = error.constraints
+          ? Object.values(error.constraints)[0]
+          : '验证失败';
+
+        throw new BadRequestException({
+          message: firstConstraint,
+          error: 'Bad Request',
+          statusCode: 400,
+        });
+      },
+    }),
+  );
+  app.useGlobalInterceptors(new ResponseInterceptor());
+  await app.listen(process.env.PORT ?? 3001);
+}
+bootstrap();