fix: add default relay peer so fresh installs can sync Infonet

On a fresh Docker (or local) install, MESH_RELAY_PEERS was empty and
no bootstrap manifest existed, leaving the Infonet node with zero
peers to sync from — causing perpetual "RETRYING" status.

Set cipher0.shadowbroker.info:8000 as the default relay peer in both
the config defaults and docker-compose.yml so new installations sync
immediately after activating the wormhole.

backend/services/config.py

@@ -27,7 +27,7 @@ class Settings(BaseSettings):
     MESH_RNS_ENABLED: bool = False
     MESH_ARTI_ENABLED: bool = False
     MESH_ARTI_SOCKS_PORT: int = 9050
-    MESH_RELAY_PEERS: str = ""
+    MESH_RELAY_PEERS: str = "http://cipher0.shadowbroker.info:8000"
     MESH_BOOTSTRAP_DISABLED: bool = False
     MESH_BOOTSTRAP_MANIFEST_PATH: str = "data/bootstrap_peers.json"
     MESH_BOOTSTRAP_SIGNER_PUBLIC_KEY: str = ""

docker-compose.yml

@@ -12,6 +12,8 @@ services:
       - ADMIN_KEY=${ADMIN_KEY:-}
       # Override allowed CORS origins (comma-separated). Auto-detects LAN IPs if empty.
       - CORS_ORIGINS=${CORS_ORIGINS:-}
+      # Default Infonet relay peer so fresh installs can sync immediately.
+      - MESH_RELAY_PEERS=${MESH_RELAY_PEERS:-http://cipher0.shadowbroker.info:8000}
     volumes:
       - backend_data:/app/data
     restart: unless-stopped