Update packages/nestjs/src/fedify.middleware.ts

    headers,

    // @ts-ignore: duplex is not supported in Deno, but it is in Node.js

    duplex: "half",

    body: req.method === "GET" || req.method === "HEAD" ? undefined : req.body,

    body: req.method === "GET" || req.method === "HEAD" ? undefined : (req.body && typeof req.body === 'object' && !Buffer.isBuffer(req.body) ? JSON.stringify(req.body) : req.body),

  });

}