The parameters domain and root_url are useful when behind a reverse proxy
to indicate Grafana how to serve URL like redirections.
For example, when asking to generate a short URL:
- without any configuration, it uses socket://localhost:3000/goto/
 - with domain set, it uses socket://grafana.nasqueron.org:3000/goto/
 - with root_url set it correctly uses https://grafana.nasqueron.org/goto/
 
References:
- https://grafana.com/docs/grafana/latest/setup-grafana/configure-grafana/
 - https://grafana.com/tutorials/run-grafana-behind-a-proxy/
 
Ref T651