Grafana dashboard: CoreDNS with NodeLocalDNS
Description: A dashboard for the CoreDNS DNS server which also exposes NodeLocal Cache  metrics.

- Until revision 5 this dashboard is compatible with CoreDNS 1.6.x and below
- From revision 6 this dashboard is compatible with CoreDNS 1.7.x and above

The reason for this incompatibility is that release 1.7.0 introduced a breaking change on naming convention of some metrics. For more info check, [CoreDNS 1.7.0 Release Notes](https://coredns.io/2020/06/15/coredns-1.7.0-release/)

Kudos to [Stelios Mavroudis](https://github.com/smavroud) for this fix.

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