Handle TLS configuration through (docker) Env vars

[P4ndaFR]

Is your feature request related to a problem? Please describe.
From what in can see in docker/config_template.yaml there is no way to configure TLS through docker env vars

Describe the solution you'd like
Add the related keys to docker/config_template.yaml

Describe alternatives you've considered
As I'm deploying on kubernetes, I have considered using a ConfigMap, however it implies moving the rest of the config and handling the merge with the auto-setup generated config.

Additional context
I'm willing to provide a pull request if you are ok with this idea

[P4ndaFR]

Fixed by #783, closing