import type * as Cloudflare from "alchemy/Cloudflare";import type { marketingWorker } from "../infra/stack"; type MarketingBindings = Cloudflare.InferEnv<ReturnType<typeof marketingWorker>>; type MarketingEnv = {  PUBLIC_ANALYTICS_PATH?: string;} & MarketingBindings; const POSTHOG_INGEST_HOST = "us.i.posthog.com";const POSTHOG_ASSETS_HOST = "us-assets.i.posthog.com"; const posthogProxyPath = (env: MarketingEnv) =>  `/api/${(env.PUBLIC_ANALYTICS_PATH ?? "a").replace(/^\/+|\/+$/g, "")}`; const isPosthogProxyRequest = (pathname: string, proxyPath: string) =>  pathname === proxyPath || pathname.startsWith(`${proxyPath}/`); const proxyPosthog = (request: Request, pathname: string, proxyPath: string) => {  const url = new URL(request.url);  url.hostname = pathname.startsWith(`${proxyPath}/static/`)    ? POSTHOG_ASSETS_HOST    : POSTHOG_INGEST_HOST;  url.protocol = "https:";  url.port = "";  url.pathname = pathname.slice(proxyPath.length) || "/";   const upstream = new Request(url, request);  upstream.headers.delete("cookie");  return fetch(upstream);}; export default {  fetch: (request: Request, env: MarketingEnv) => {    const { pathname } = new URL(request.url);     const proxyPath = posthogProxyPath(env);    if (isPosthogProxyRequest(pathname, proxyPath)) {      return proxyPosthog(request, pathname, proxyPath);    }     return env.ASSETS.fetch(request);  },};