Restartability for long-running instances

## Background

Quickstart needs to progress in it's ability to run a long-lived instance. Therefore it needs to persist it's onboarding configuration, and state in general.

The intent here is that this opens up Quickstart to be a playground for practicing longer term operations, such as domain migrations, network and application upgrades. Presently this is not possible due to the current ephemeral nature of the containers

## Questions

* What is the impact on Splice LocalNet to facilitate this?

## Proposed Tasks

* Ensure onboarding/startup processes idempotent
* Enable persisted volumes that will survive a restart:
* PostgreSQL data
* Configuration
* Anything else?
* Consider startup orchestration/ordering that may be impacted by subsequent starts
* Make command to "stop" all containers (if not already the case)
* Make "clean-volumes" to remove all docker volumes (in order to start fresh again)
* Make "clean" becomes "clean-build"?

## Verification

Make sure that everything can be restarted (even docker/host), and things can be resumed again where they left off.