Match the website change: the ntfy relay is reached through the public
reverse proxy, which runs outside the compose network and can only reach
a service via a published host port. Update the "no published host port /
internal-only publisher" claims in android/PLAN.md (§11 + §13) and
website/BACKEND_DESIGN.md to describe the published NTFY_HOST_PORT
(default 2586 -> ntfy:80), and note that both devices and the backend
publisher reach ntfy on the public origin.
Co-Authored-By: Claude <noreply@anthropic.com>
wtclaude
0d5c0486dd