Documentation for the main functionality and configuration options of the CoreDNS integration.

The documentation will cover:

• Infrastructure Requirements
• Explanation of the purpose of the CoreDNS integration and the main use cases for it.
• Deploying CoreDNS for Kuadrant
• Configuring CoreDNS for Kuadrant (Geo etc..)
• Testing the deployment
• Configuring an edge server (zone delegation)

Known issue: Kuadrant/dns-operator#438