We have metrics being written to a log file for now as specified in legacy/trac#21315, and the metrics team is working on setting up a collector module for it in legacy/trac#29461. We should add a handler at the broker at `snowflake-broker@bamsoftware.com/metrics` so the collector can make GET requests for the collected metrics. The response should be `Content-Type: text/plain; charset=utf-8`