feat: 应用监听端口改为 80，添加 Spot 实例支持

- 默认端口从 3000 改为 80
- Dockerfile 更新 EXPOSE 和健康检查端口
- 添加 ECI Spot 抢占式实例注解
- 移除 USER node 以支持监听 80 端口

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

src/deploy.ts

@@ -12,7 +12,7 @@ import { K8sClient, V1Deployment, V1Ingress, V1IngressRule, V1ServicePort } from
 const K8S_API_URL = process.env.K8S_API_URL || '';
 const K8S_API_TOKEN = process.env.K8S_API_TOKEN || '';
 const DEV_HOST = process.env.DEV_HOST || 'dev.d8d.fun';
-const TLS_SECRET_NAME = process.env.TLS_SECRET_NAME || 'd8d-tls';
+const TLS_SECRET_NAME = process.env.DEV_TLS_SECRET_NAME || 'd8d-proxy-tls';
 
 // 专用命名空间
 const NAMESPACE = 'd8d-proxy';