So for instance in `theme.liquid` I'd add something like:
<meta http-equiv="refresh" content="0; URL=https://your-domain.com" />
<!-- just in case the meta tag is not read properly, here is plan B: a JS redirect -->
window.location = 'https://your-domain.com;
That way your store (my-shop.myshopify.com) will be re-directed to your site.