docs: Refactor instructions for installing FlowFuse on self-hosted environment using docker

[ppawlowski]

Description

This pull request aims to simplify instructions for installing FlowFuse on a self-hosted environment using Docker Compose.
This pull request should be introduced together with FlowFuse/docker-compose#160

Related Issue(s)

closes #4633

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

[joepavitt]

I think there should be a reference to the Quick Start instructions at the top of this page, emphasising that this page is focussed on a production-environment.

I'd also like to see the first iteration of a checklist here too, I'll add a scaffold checklist in place which you can then fix the content of.

[joepavitt]

Actually, the lack of checklist and "ease of navigation" is lost due to the bug in the "On this page" on our website:

The indentation is wrong. I'll see if I can fix it quickly - PR Opened

[ppawlowski]

I think there should be a reference to the Quick Start instructions at the top of this page, emphasising that this page is focussed on a production-environment.

I'd also like to see the first iteration of a checklist here too, I'll add a scaffold checklist in place which you can then fix the content of.

Check #4667

[joepavitt]

Not merging so you can coordinate with #4667 and FlowFuse/docker-compose#160