Linus Rath 481c4b6030 feat: serve Prometheus metrics and split health into live and ready ...

- `/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

2026-11-01 02:59:40 +01:00

..

route.ts

feat: serve Prometheus metrics and split health into live and ready

2026-11-01 02:59:40 +01:00