lk-jwt-service v0.6.0 ships a healthcheck which builds its URL as
http://localhost:$LIVEKIT_JWT_BIND/healthz, interpolating the bind
address into the port slot. We set LIVEKIT_JWT_BIND to ":8080", so the
check requests http://localhost::8080/healthz, which does not parse and
can never succeed. The container therefore sits permanently unhealthy,
Traefik skips unhealthy containers, and the service stops being routed,
so Element Call fails to obtain an SFU token.

No value satisfies both sides: the service passes LIVEKIT_JWT_BIND to
ListenAndServe, which needs a full bind address, while the healthcheck
needs a bare port. The check only works when the variable is unset and
its own "8080" fallback applies, which would mean ignoring a configured
port. Correcting the check from here is not possible either, as the
image is built FROM scratch and has no shell for a --health-cmd
override to use.

Turn the healthcheck off, behind a variable so it can be turned back on
once upstream fixes it. This restores the pre-v0.6.0 behavior, where the
image carried no healthcheck at all.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>