Publish placeholder DNS on registration

karldns/web/templates_public.py

@@ -183,7 +183,7 @@ def _render_api_docs_page(settings: DdnsSettings, request_ip: str | None = None)
                 <h2>Endpoints</h2>
                 <ol class="simple-steps text-start">
                   <li><strong>POST /api/v1/hostnames.</strong> Create a pending hostname and private setup values. The response includes <code>registration_url</code>.</li>
-                  <li><strong>GET or POST /api/v1/router/register/&lt;karl_secret&gt;.</strong> Register the hostname after secrets are saved. Publishes an initial DNS record when a public request IP or explicit <code>myip</code>/<code>myipv6</code> value is available; otherwise the first router update publishes it.</li>
+                  <li><strong>GET or POST /api/v1/router/register/&lt;karl_secret&gt;.</strong> Register the hostname after secrets are saved. Publishes an initial DNS record from a public request IP or explicit <code>myip</code>/<code>myipv6</code> value. If no public IP is visible, publishes a temporary <code>192.0.2.1</code> A record until the first router update.</li>
                   <li><strong>GET or POST /api/v1/router/update/&lt;karl_secret&gt;.</strong> Router-friendly update endpoint. Supports <code>myip</code>, <code>ipaddr</code>, <code>myipv6</code>, and <code>ip6addr</code>.</li>
                   <li><strong>GET /api/v1/hostnames/&lt;karl_secret&gt;.</strong> Read hostname status and recent history.</li>
                   <li><strong>POST /api/v1/hostnames/&lt;karl_secret&gt;/rotate-update-url.</strong> Replace the private router update URL.</li>