INF-302 Expose auto upgrading flag

[endline]

Description

To allow introspection on whether host is running the auto upgrade cron as offered in audius-cli.
Was necessary to consume this from an env var as a container by design has no knowledge of host.

Additionally, the ask requested a flag to show whether using managed DB or not.
With the scope limited to that of simply checking for localhost. I'll add that this would give a false negative for something like a kube environment, whereby service names would be other than localhost.

RELATED PRs
AudiusProject/audius-docker-compose#144
https://github.com/AudiusProject/healthz/pull/1

Tests

# examine health check for new fields
# you can modify the auto upgrade enabled value in docker-compose.yml if desired
# which would be set by audius-cli in a deployed context

$ curl -s http://audius-protocol-creator-node-1:4000/health_check | jq [.data.autoUpgradeEnabled,.data.databaseIsLocalhost]
[
  false,
  true
]

$ curl -s http://audius-protocol-discovery-provider-1:5000/health_check | jq [.data.auto_upgrade_enabled,.data.database_is_localhost]
[
  false,
  true
]

[SidSethi]

merge conflict tho