Hi,
According to this website, it should be possible to host a static website on Sharepoint:
https://sharepoint.handsontek.net/2019/06/13/how-to-host-a-static-html-site-on-sharepoint/
This would only require a minor change, namely change the default extension of all outputfiles from .html to .aspx (and make sure all internal links are aware of this).
For the time being I think I can solve this with a find-replace in all files using Notepadd++.
Idea for the future improvement?
Mathias