Reaching the dev PWA through the Pangolin/newt tunnel failed: Vite's default
host check 403s any non-localhost Host header ('Blocked request'), which the
tunnel health checks on / and /health read as unhealthy. Add allowedHosts:true
and host:true so the dev server accepts the tunnel hostname and listens on all
interfaces. Dev-only config; the production image serves the built PWA itself.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>