Feature: add values to override dnsPolicy and dnsConfig in deployment

[victor-keltio]

Hey there!

Description of the change

Add the possibility to override the DNS policy and the DNS configurations of the created deployment.

Benefits

By default, containers are using the cluster's DNS, but sometimes we want to use an external DNS server. These modifications make it possible.

Possible drawbacks

None.

Checklist

• [X] Chart version bumped in Chart.yaml according to semver.
• [X] Variables are documented in the README.md

[victor-keltio]

Hey @dirsigler, I just sync-ed the StatefulSet and the Deployment with the new values! :)

Btw, many thanks for this chart! ❤️

[dirsigler]

Thank you @victor-keltio for the awesome addition!