autocert support

Describe the feature request

A public facing https port needs a cert. It would be nice if the cert could automatically be obtained from letsencrypt.

Describe alternatives you've considered

I guess one could use caddy as another proxy in front - but that is less than ideal. It would be better to integrate

https://go-acme.github.io/lego/usage/library/

Affected area

• Docs
• Installation
• Performance and Scalability
• Security
• User Experience
• Test and Release
• Developer Infrastructure
• Client Plugin
• Server Plugin
• Extensions
• Others