In a production site, this would be a page with general instructions for the reviewers, and it would of course be behind a password so you would not even be able to reach this page from the outside world. The whole site would be private, only for subscribers.

There are only three (fishy) proposals here. With numbers like that, it wouldn’t really be worth building a site like this. But it works as a demo. Each proposal here demonstrates a different type of attached file, in case that’s interesting!