如何从Nest fastify服务器中创建的中间件发送响应？

import { Injectable, NestMiddleware } from '@nestjs/common';
import { Request, Response, NextFunction } from 'express';

@Injectable()
export class CustomMiddleware implements NestMiddleware {
  use(req: Request, res: Response, next: NextFunction) {
    // 设置响应的状态码
    res.status(200);
    
    // 设置响应的头部信息
    res.setHeader('Content-Type', 'application/json');
    
    // 设置响应的内容
    res.send({ message: 'Hello, World!' });
  }
}

import { Module, NestModule, MiddlewareConsumer } from '@nestjs/common';
import { CustomMiddleware } from './custom.middleware';

@Module({})
export class AppModule implements NestModule {
  configure(consumer: MiddlewareConsumer) {
    consumer
      .apply(CustomMiddleware)
      .forRoutes('*'); // 添加到所有路由的中间件列表中
  }
}