Add env_var to mute graph-node logging. Update ./start_ocean.sh via barge to mute grap-node logs.

[idiom-bytes]

trafficstars

Problem:

Right now, subgraph defaults to graph-node having logger turned on. https://github.com/oceanprotocol/ocean-subgraph/blob/9fb268cde9e1dabf54fde1f95bc39a04d157e776/docker/docker-compose.yml#L21

I have expanded my own cli history to handle this, however for anyone else, this creates tens of thousands of lines of debug to get spat out, which means you need to figure out other ways to verify contract deployments, or grab ganache pk's.

Can we disable this by default, or put it into an env_var so we can run barge with this muted?

DOD:

• [ ] Attach graph-node log settings into an {env_var}.
• [ ] Attach it to barge via ./start_ocean.sh