groq api proxy with deno deploy

groq.ts

import { serve } from "https://deno.land/std@0.181.0/http/server.ts";

async function handleRequest(request: Request): Promise<Response> {
  if (request.method === "OPTIONS") {
    return handleOPTIONS(request);
  }

  const url = new URL(request.url);
  url.host = "api.groq.com";
  url.pathname = "/openai" + url.pathname;

  let body;
  if (request.method === "POST") {
    body = await request.json();
    body.model = "mixtral-8x7b-32768";
  }

  const modifiedRequest = new Request(url.toString(), {
    headers: request.headers,
    method: request.method,
    body: typeof body === "object" ? JSON.stringify(body) : null,
    redirect: "follow",
  });

  return fetch(modifiedRequest);
}

function handleOPTIONS(request: Request): Response {
  return new Response(null, {
    headers: {
      "Access-Control-Allow-Origin": "*",
      "Access-Control-Allow-Methods": "*",
      "Access-Control-Allow-Headers": "*",
    },
  });
}

serve(handleRequest);