[draft] ec2 architecture and guide

[conceptualshark]

Description

Draft/WIP PR to explore changes and content movement in the preview.

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[github-actions]

👋 🤖 🤔 Hello, @Langleu! Did you make your changes in all the right places?

These files were changed only in docs/. You might want to duplicate these changes in versioned_docs/version-8.6/.

• docs/self-managed/concepts/img/placeholder.png
• docs/self-managed/concepts/reference-architecture.md
• docs/self-managed/setup/assets/aws-ec2-arch.png
• docs/self-managed/setup/deploy/amazon/aws-ec2.md
• docs/self-managed/setup/deploy/local/img/placeholder-manual-ha.drawio.png
• docs/self-managed/setup/deploy/local/img/placeholder-manual-single.drawio.png
• docs/self-managed/setup/deploy/local/manual.md

You may have done this intentionally, but we wanted to point it out in case you didn't. You can read more about the versioning within our docs in our documentation guidelines.

[github-actions]

The preview environment relating to the commit c92a852 has successfully been deployed. You can access it at https://preview.docs.camunda.cloud/pr-4585/index.html

[Langleu]

@theburi and @conceptualshark maybe you could have a look over this next week and give some general feedback on maybe what you're missing and still expecting to see.

I was going in the direction of GitLab's approach on the topic just that we don't have any benchmarks to guide (which I don't see happening anytime soon).

Essentially, on a high level talking about the idea of Reference Architectures, actual architecture, and guiding customers along to choose their path based on Kubernetes || manual (single jar) and from there have dedicated pages that cover the specific architecture to that component, talk about general requirements, etc. etc. and lastly guide from there to existing reference implementations based on the examples that we have.

• Reference Architecture
  • Kubernetes
    • AWS EKS
    • Dual Region
    • any other ...
  • Manual
    • AWS EC2
    • any other ...

Current pages:

• https://preview.docs.camunda.cloud/pr-4585/docs/next/self-managed/concepts/reference-architecture/
  • https://preview.docs.camunda.cloud/pr-4585/docs/next/self-managed/setup/deploy/local/manual/
    • https://preview.docs.camunda.cloud/pr-4585/docs/next/self-managed/setup/deploy/amazon/aws-ec2/

I'm on a team event next week + RSG, so take your time!