There’s a lot of ways to do this but I think the easiest way is just to add some javascript into your homepage via the theme editor like
<script>
if (window.location.href == 'https://mysite.com/homepage'){
window.location.replace("http://mysite.com/menu");
}
</script>
it’s not the most elegant but this way you can edit it yourself through the TI admin as yo please. A more performant option would be to put a rewrite into your apache/nginx configuration.
