the-biergarten-app/src/Website/app/routes/logout.tsx

import { redirect } from "react-router";
import { destroySession, getSession } from "../lib/auth.server";
import type { Route } from "./+types/logout";

export async function loader({ request }: Route.LoaderArgs) {
  const session = await getSession(request);
  return redirect("/", {
    headers: { "Set-Cookie": await destroySession(session) },
  });
}