If you use any website generator with a UI which can save or export the site locally, you can then upload those files to the Surfer App via the File Manager feature and host the site with ease.

Examples of such site creators are:
https://getpublii.com
https://www.goodfirms.co/software/mobirise
https://www.silex.me
https://html5up.net/ templates
https://github.com/emilwallner/Screenshot-to-code AI fun