Accept root credentials from existing secret

[jennydaman]

Adds a feature so that the environment variables ZO_ROOT_USER_EMAIL and ZO_ROOT_USER_PASSWORD can be sourced from an existing secret.

Example values.yaml:

auth:
  existingRootUserSecret:
    name: my-openobserve-root-user

Furthermore, I fixed some minor Helm YAML gotchas: instead of "{{ .Values.auth.ZO_ROOT_USER_PASSWORD }}" the code should be {{ .Values.auth.ZO_ROOT_USER_PASSWORD | quote }} to properly handle values which contain \ or " characters.

[jennydaman]

Here's how you can try it out:

kubectl create secret generic my-openobserve-root-user --from-literal=ZO_ROOT_USER_EMAIL='[email protected]' --from-literal=ZO_ROOT_USER_PASSWORD='ADifferentPass123'
helm install --generate-name --set auth.existingRootUserSecret.name=my-openobserve-root-user ./charts/openobserve-standalone