Adding custom CSS in Kubernetes setup

[Crease29]

Hello there,

I'm quite new to Kubernetes. I have followed this tutorial to set up Authentik on a Kubernetes cluster, which works fine. Now I wanted to follow the Customization Guide to add some custom CSS, but I'm quite unsure how to deploy the ConfigMap when running helm upgrade --install authentik -n authentik authentik/authentik -f authentik/values.yaml and where exactly to add the volumes and volumeMounts in the values.yaml, because I think the guide is missing whether to add it to the authentik, server or worker service.

This is my folder structure:

authentik
    charts
        authentik-2024.6.1.tgz
    Chart.lock
    Chart.yaml <-- has authentic set as `dependencies`
    values.yaml

I think if I would just download the contents of the authentik helm chart repository it would be much easier for me to apply these changes, however that would also mean I'd lose the convenience of always being able to just bump the version number when I want to deploy a newer version. What's the best practice here?

Any help would be highly appreciated. Thank you very much in advance.