soroban-rpc: create grafana dashboard

[tsachiherman]

What ?

The goal of this task is to create a grafana dashboard that would give us monitoring capabilities of the deployed servers.

[mollykarcher]

@tsachiherman is this a duplicate of stellar/stellar-cli#850 ?

[tsachiherman]

@tsachiherman is this a duplicate of stellar/stellar-cli#850 ?

yes. I'll close stellar/stellar-cli#850.

[2opremio]

There is already a grafana dashboard but it is not great. We should at least have all the RED metrics Rate, Errors, Duration for every JSON-RPC endpoint.

[aditya1702]

The dashboard has been updated to show the relevant metrics - https://grafana.stellar-ops.com/d/ut9rEquVz/soroban-rpc?orgId=1

Ops will figure out how to publish it to public Grafana this week. And the JSON has already been added to puppet - https://github.com/stellar/puppet-v4/pull/3694