index.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <meta name="referrer" content="no-referrer" />
        <title>Redirecting soon...</title>
    </head>
    <body>
        <p id="enable-js-prompt">If you are not redirected, make sure you have JavaScript enabled.</p>
        <script>
            document.getElementById("enable-js-prompt").style.display = "none";

            var url_string = window.location.href;
            var url = new URL(url_string);
            var c = url.searchParams.get("redirect");
            if (c == null) {
                document.write("No redirect link found.");
                document.close();
            } else {
                document.write("Redirecting soon...");
                window.location.replace(c);
            }
        </script>
    </body>
</html>