Fork Keycloak Helm chart

[ccremer]

Context

The Helm chart by CodeCentric (https://github.com/codecentric/helm-charts/tree/master/charts/keycloak) is using Helm values as string. This makes adding init containers or custom themes very difficult through configuration hierarchy.

I propose to fork the current Helm chart and maintain it in github.com/appuio/charts instead with the following changes:

• Transform several string parameters to object parameters -> This will make the component easier to use for the future, but it's a breaking change

Alternatives

Continue using limitations of string parameters of the upstream Helm chart