Configure node exporter on Grafana for two eth nodes

[cfl0ws]

• The Graph Open Ethereum archive node

• SKALE GETH full node

[cfl0ws]

@novy4 your key is on the GETH full node and details in our shared collaboration space.

[frankchen07]

this ticket is in the wrong repository, breakouts replicated here in the appropriate repos:

https://github.com/Chainflow/skale-private/issues/8
https://github.com/Chainflow/the-graph/issues/10