- `/api/metrics` in Prometheus text format, off until `METRICS_TOKEN`
or `METRICS_TOKEN_FILE` is set (404 before, 401 without the bearer
token): requests per route group with status class and latency,
sign-in outcomes, calls to Stalwart, WOPI, translation, the plugin
proxy and OAuth, browser errors, errors today, process memory,
event-loop lag, uptime and build info. Labels come from fixed lists.
Each replica serves its own.
- `/api/health/live` answers while the process runs;
`/api/health/ready` checks the config, the shared store, writable
data dirs and Stalwart's session resource. `/api/health` and
`/api/ready` are unchanged.
- the Docker image gets a HEALTHCHECK on the live endpoint
- adds prom-client, and the OpenTelemetry packages the tracing step
loads on demand
Linus Rath