Enhancement: Add Compatibility with Dappnode

[JHGrove3]

Dappnode is among the most popular solutions for home and solo stakers to run the Ethereum chain. It supports a number of Distributed Validator Technology (DVT) solutions like SSV and Obol.

Lighthouse is the #1 or #2 most popular Consensus client among Dappnode users. It would be great if the Siren platform was also able to integrate with Dappnode.

There might have to be some workarounds / integrations involved since Dappnode has its own methods of assigning and managing validator keys. But a robust user interface for Lighthouse metrics and reporting would be extremely valuable.