Add relay-backed public node registration

packages/tracker/meshnet_tracker/cli.py

@@ -33,6 +33,11 @@ def main() -> None:
         default=None,
         help="This tracker's own URL as seen by peers (auto-derived from --host/--port if omitted)",
     )
+    start_cmd.add_argument(
+        "--relay-url",
+        default=None,
+        help="Public ws(s):// relay URL advertised to nodes, for example wss://ai.neuron.d-popov.com/ws",
+    )
 
     args = parser.parse_args()
 
@@ -44,6 +49,7 @@ def main() -> None:
             heartbeat_timeout=args.heartbeat_timeout,
             cluster_peers=cluster_peers or None,
             cluster_self_url=args.self_url,
+            relay_url=args.relay_url,
         )
         port = server.start()
         print(f"meshnet-tracker listening on http://{args.host}:{port}", flush=True)