How i serve https://www.isan.eu.org/ using Cloudflare Workers and GitHub Pages

index.js

async function handleRequest(request) {
  let ms = Date.now()
  let add = new Date(ms + 604800000)
  const url = new URL(request.url)
  url.hostname = "ihsangan.github.io"
  let req = new Request(url, request)
  let response = await fetch(req, {
    cf: {
      minify: { javascript: true, css: true, html: true },
      cacheTtl: 86400,
      cacheEverything: true,
      apps: false,
      scrapeShield: false,
    },
  })
  response = new Response(response.body, response)
  if (response.status === 404) {
    let nf = await fetch("https://cdn.jsdelivr.net/gh/ihsangan/ihsangan.github.io@ext/workers-404.html")
    nf = new Response(nf.body, { status: 404, headers: { "Content-Type": "text/html; charset=utf-8", "Retry-After": "0" }})
    return nf
  } else {
  response.headers.delete("Via")
  response.headers.delete("access-control-allow-origin")
  response.headers.delete("etag")
  response.headers.delete("permissions-policy")
  response.headers.delete("date")
  response.headers.delete("strict-transport-security")
  response.headers.delete("x-cache")
  response.headers.delete("x-cache-hits")
  response.headers.delete("x-served-by")
  response.headers.delete("x-proxy-cache")
  response.headers.delete("x-github-request-id")
  response.headers.delete("x-fastly-request-id")
  response.headers.delete("x-timer")
  response.headers.set("Expires", add.toUTCString())
  response.headers.set("Cache-Control", "public, max-age=86400")
  response.headers.set("X-Powered-By", "GitHub Pages, Cloudflare Workers")
  response.headers.set("X-Timestamp", ms)
  const end = Date.now()
  const time = end - ms
  response.headers.set("X-Response-Time", time)
  return response
  }
}
addEventListener("fetch", event => {
  return event.respondWith(handleRequest(event.request))
})