Edit: I set up CloudFlare in front of the server and there's now a working HTTPS version along with the HTTP version accessible from inside MOROS. This should also work when I'll use again the web server inside the OS. Thanks for prompting me to look into it!
“You only need encryption for the sensitive stuff” is what we did, poorly, in the late ‘00s / early ‘10s, and it was rightfully proven to be a bad idea. There’s a reason why browsers treat HTTP the way they currently do, and it isn’t because they’ve been co-opted by Big Certificate Authority.
EDIT: and as the other commenter says, there are download links.
Which IMO has been a huge mistake since breaking caching proxies for networks because we want to prove authenticity and have to do secrecy as well has been quite silly.