Docs

Three pages cover the whole tool. Anything not described here is not configurable on purpose.

Compatibility

ItemSupported
Operating systemLinux, kernel 5.10 or newer (amd64, arm64)
Init systemsystemd, or any supervisor that can restart a foreground process
Backend protocolHTTP/1.1 with JSON bodies; TLS 1.2 or newer
Config formatYAML; environment variables override file values

Looking for the release history? It is in the changelog.