this is my first try to upload my web on internet but at the end it doesn't work and I see just
404
File not found
The site configured at this address does not contain the requested file.
If this is your site, make sure that the filename case matches the URL.
For root URLs (like https://example.com/) you must provide an index.html file.
Read the full documentation for more information about using GitHub Pages.
and I don't know WHY!!!!!?