Hello, everyone. Can someone explain to me how to start the datahub and what QuickStart does? If a container goes down, just start it with docker??? Thanks in advance for your help!

The quickstart basically calls docker-compose.

Quickstart is intended for local deploys to clarify, so generally it should not be looked to for production grade levels of availability. To handle containers going down etc. it's recommended to use an orchestrator like kubernetes.