Monitoring setup for the graph

[vovacha]

• Updated docker-compose (added Node Exporter and cAdvisor services)
• Updated MAIN Prometheus config
• Updated STAGE Prometheus config
• Updated existing Grafana dashboard with STAGE env metrics
  • chain+squid metrics
  • node metrics
  • docker container metrics
• Added alarms
  • low disk space
  • slow block time
  • no data from metrics

https://dashboard.zero.io/

[FiberMan]

PR: https://gitlab.com/zero.io/devops/big/-/merge_requests/4/diffs#95ee1b9b51394e917f2469de1d4f8bee16e5a575