docker-compose does not recursively expand nested `${...}` in `:-`
defaults, so `TURN_DOMAIN=${TURN_DOMAIN:-${LIVEKIT_DOMAIN}}` leaked the
literal string `${LIVEKIT_DOMAIN}` into the container, breaking TURN
and WebRTC connectivity. Set the default in .env.sample where abra
shell-expands it before docker-compose sees it.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Use Docker embedded DNS (127.0.0.11) with variables in proxy_pass
instead of upstream blocks to prevent nginx crash loops when
backend isn't ready during startup
- Add STACK_NAME env to web and livekit services for golang
template_driver config resolution
- Add LIVEKIT_API_KEY env to livekit service for config template
- Add livekit_as secret to livekit service
- Increase web healthcheck retries and start_period
- Bump NGINX_CONF_VERSION to v2
