Did you change your primary domain on shopify? That should solve your problem. Check this out: https://help.shopify.com/de/en/manual/domains/domain-type/change-primary-domainSorry it's german, I bet there is also an english version of it.

Did you find a solution to your problem? I'm facing the same. As I read, you need the shopify online store but you can redirect from it to your own storefront. I haven't tryed yet but there's even a Liquid theme especially for that. I found it in thi...