feat: 集成 Cloudflare Tunnel 支持

- docker-compose.yml 添加 cloudflared 服务
- 更新 .env.example 和 README.md 添加配置说明
- 支持通过 Cloudflare Tunnel 进行安全部署

.env.example

@@ -19,9 +19,13 @@ ALIYUN_SLS_ENDPOINT=cn-hangzhou.log.aliyuncs.com
 ALIYUN_SLS_PROJECT=your_project_name
 ALIYUN_SLS_LOGSTORE=your_logstore_name
 
-# 账号同步脚本配置 (sync-accounts.sh)
+# Deploy Configuration (sync-accounts.sh)
 SYNC_SERVER=user@your-server.com
 SYNC_REMOTE_PATH=/opt/droid2api
 DEPLOY_TYPE=docker-compose
 DOCKER_SERVICE_NAME=droid2api
 PM2_APP_NAME=droid2api
+
+# Cloudflare Tunnel Configuration (Optional)
+# Get token from: https://one.dash.cloudflare.com/ -> Networks -> Tunnels
+TUNNEL_TOKEN=