worker.js
 1export default {
 2  async fetch(request, env) {
 3    const url = new URL(request.url);
 4    const key = url.pathname.slice(1);
 5
 6    const object = await env.OPEN_SOURCE_WEBSITE_ASSETS_BUCKET.get(key);
 7    if (!object) {
 8      return await fetch("https://zed.dev/404");
 9    }
10
11    const headers = new Headers();
12    object.writeHttpMetadata(headers);
13    headers.set("etag", object.httpEtag);
14
15    return new Response(object.body, {
16      headers,
17    });
18  },
19};