Setup CORS with domain

This is my current setup for all of my backend services, this CORS is based on my domain.

(this one is generated by AI, I haven’t fully tested it)

  // Enable CORS
  app.enableCors({
    origin: (origin, callback) => {
      // Allow requests with no origin (mobile apps, Postman, etc.)
      if (!origin) return callback(null, true);

      // List of allowed origins
      const allowedOrigins = ['http://localhost:9000'];

      // Check if origin is in the allowed list
      if (allowedOrigins.includes(origin)) {
        return callback(null, true);
      }

      // Check if origin matches thebrownbox.dev domain pattern
      // This allows: thebrownbox.dev, www.thebrownbox.dev, api.thebrownbox.dev, etc.
      const thebrownboxPattern =
        /^https?:\/\/([a-zA-Z0-9-]+\.)*thebrownbox\.dev(:[0-9]+)?$/;
      if (thebrownboxPattern.test(origin)) {
        return callback(null, true);
      }

      // Reject all other origins
      callback(new Error('Not allowed by CORS'), false);
    },
    credentials: true,
    methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
    allowedHeaders: [
      'Origin',
      'X-Requested-With',
      'Content-Type',
      'Accept',
      'Authorization',
      'X-Access-Token',
    ],
  });