feat: add k8s integration for tutor paragon static hosting

[Ang-m4]

Description

This pull request introduces support for mounting Paragon theme static files into the MFE Kubernetes deployment. The changes ensure that the correct theme CSS files are generated, made available as config maps, and mounted as read-only volumes in the application pods.

Kubernetes config and volume management:

• Added a paragon-static-files config map generator to kustomization-configmapgenerator for including core and theme CSS files, dynamically supporting multiple themes.
• Updated mfe-k8s-volumes to create a static-files volume from the generated config map, mapping core and theme CSS files to their respective paths.
• Modified mfe-k8s-volume-mounts to mount the static-files volume at /paragon-statics as read-only in the MFE containers.

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[Ang-m4]

Hi @brian-smith-tcril, @sarina,
Hope you're doing great!

As the last piece of work for completing the Paragon plugin implementation, I’ve just opened this PR with the Kubernetes integration 😊 , now that overhangio/tutor-mfe#267 has been successfully merged.

[brian-smith-tcril]

This seems to match the patterns from the caddy version, so from what I can tell this LGTM.

I'd like to have someone who knows k8s better than I do double check this.

@arbrandes - would you be able to take a quick look?

[sarina]

@arbrandes - can we get your 👀 to finish out this FC?

[arbrandes]

I can't speak to the actual files that are being mounted, but this looks alright to me, with the exception of a redundant if block.

I did not actually test this on a Tutor k8s deployment, though. @Ang-m4, did you?

[Ang-m4]

@arbrandes, You’re right, I forgot to update the conditionals after adding the same control variable in k8s-deployments. I’ll fix that shortly.

For k8s testing, I set up an environment with Minikube and confirmed that the volumes were mounted correctly for the MFE service. I also verified that the service was serving static files as expected.

[arbrandes]

Thanks for addressing the previous comments and confirming this was tested. Looks good!

[arbrandes]

@brian-smith-tcril, I'll let you do the honors.