This time, I've tried to be more efficient than for my previous side-project: I've bought a theme and adapted it to use it as a landing page on https://webdocs.app, then, I will be able to use it for the full website when the product is ready.
The final goal is to actually use WebDocs to generate its own homepage, but for the time being, the landing page is live and I will be able to do some product validation. Besides that, I'm working on the implementation!