Add Harbor Gateway auto-detection for client routing

docker-compose.client.yml

@@ -14,6 +14,8 @@ services:
       DATA_DIR: /var/lib/vpn-proxy
       SING_BOX_CONFIG: /etc/sing-box/config.json
       SING_BOX_CACHE: /var/lib/sing-box/cache.db
+      HARBOR_HOST_NETWORK_STATE: /run/harbor-host/network.json
+      HARBOR_GATEWAY_CONTROL_PORT: ${HARBOR_GATEWAY_CONTROL_PORT:-3456}
       LOG_LEVEL: ${LOG_LEVEL:-info}
       HTTP_PROXY: ""
       HTTPS_PROXY: ""
@@ -29,6 +31,7 @@ services:
     volumes:
       - vpn-proxy-client-data:/var/lib/vpn-proxy
       - sing-box-client-cache:/var/lib/sing-box
+      - ./.runtime:/run/harbor-host:ro
     restart: unless-stopped
     healthcheck:
       test: ["CMD", "curl", "--noproxy", "*", "-fsS", "http://127.0.0.1:${PORT:-3456}/api/state"]