Just FYI, the certificate expired today. It is still possible to navigate on the http version of littlegolem.net, though. Yet I don't like having my credentials traveling in clear text through the Internet. :)
www.littlegolem.net uses an invalid security certificate. The certificate expired on August 11, 2018, 6:55:45 PM GMT+2.
Seems to be back to normal on my windows 10 with Firefox with no special tricks. Before I could only get it to work on Microsoft Edge or Chrome on an incognito page.
Apparently certbot is not on a cronjob and the certificate expired again and I can't access the site at all with firefox (it automatically redirects to ssl and fails with no way of bypassing the expired certificate). If Richard is around, it would be great if it could be fixed.