I have an SSL certificate from LetsEncrypt. My website successfully uses HTTPS with it.
However, at random intervals this suddenly stops working. I get a Common Name mismatch error. It then just as suddenly starts wor...
I run a Droplet with Ubuntu 17.10.
My Droplet is a server using Nginx. Independently of this, it also hosts a Docker registry on another port.
The website exposed by Nginx works fine most of the time and loads quickly...