Docker - Volume mapping documentation

[mr6volt]

When looking at the Docker documentation for installation, I noticed that it appears to be missing instructions for creating folders on the host to map the persistent volume ENV entries. I only discovered this by downloading and reading the compose file that there was consideration for persistent storage at all.

The documentation needs to be updated to include information about creating folders on the host, and WHY it is important to do so. (I assume the update process requires the container to be torn down and replaced with a newly pulled image?)

Also, the SSL certificates shouldn't base64-ed into the environment variables. I think it would be better to instead be made available via a persistent folder. Thus allowing easy renewals using a command prompt on the host and a docker container restart if required.