We are looking at this feature, and for users to work with us on the model for this. Get in touch if you’re interested.
We look forward to understanding the priority of this feature before going ahead.
This is on our immediate roadmap, once your webstore is activated, contact the support team and request a custom domain, we're looking for a test group to try it out on.
Implementation would look like:
We’re looking to work with people on this feature at the moment.
Please contact us if you are interested.