Configuration options for deployment

[jnywong]

Context

We are defining certain configurations, such as

jupyterhub-cost-monitoring/src/jupyterhub_cost_monitoring/query_usage.py

Line 18 in 9469036

prometheus_host = os.environ.get("SUPPORT_PROMETHEUS_SERVER_SERVICE_HOST", "localhost")

as global variables, when really they should be passed in one place as cli arguments to run the application.

Proposal

We should consider an approach that also allows for #10

Updates and actions

No response