Introduce quick-start compose file

[ppawlowski]

Description

This pull request introduces a docker compose file which allows to spin up the FlowFuse platform without the need to clone the whole repository. This file is used in the Quick Start guide.

Related Issue(s)

Should be merged together with FlowFuse/flowfuse#4639
FlowFuse/flowfuse#4631

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Includes a DB migration? -> add the area:migration label

[hardillb]

If we are adding this, can we add version tags to the FlowFuse containers (and an addition to the release GH Action to increment it) please

[ppawlowski]

If we are adding this, can we add version tags to the FlowFuse containers (and an addition to the release GH Action to increment it) please

Since it is a quick-start compose file, I would prefer to pin our containers to the latest version instead of a specific one. With this approach, we could always serve the latest available version for a quick review by clients without additional hustle.

For the 'main' compose file I already created an issue to cover this topic.