Will LibreOffice Writer work here as a website?

LibreOffice Writer is new enough. If it can spit out HTML, you can probably upload it here. It might still look like a website from 1997, but if you’re OK with that, then I don’t see why it wouldn’t work. That said, Writer is a document editor, not a website builder. I have no idea if it can do multiple pages and links between them. The reality is that desktop based website builders are kinda dead nowadays. Everything is web based and mobile first nowadays, because how people use computers has just changed a lot.