It looks like the http://antirez.com/ site doesn't support HTTPS which causes chrome to complain when the chrome always-use-secure-connections feature is enabled:
https://support.google.com/chrome/answer/10468685?visit_id=638666980626284052-3267714392&p=first_mode&rd=1#https-only-mode&zippy=%2Cturn-on-always-use-secure-connections
This isn't the best optic when the Docker page's "Security" subsection links to an article where you're greeted with this error.
https://hub.docker.com/_/redis
I know SSL really isn't "required" for a site that is fully static content. But as the internet is generally moving towards HTTPS everywhere, this seems like something that might need to be updated with the times.