server {
        listen 9100;
        server_name _;
        root /usr/share/nginx/html_app/sub_system;
        index index.html index.htm;

       # 如果请求根目录，重定向到 index.html
       location = / {
          try_files $uri $uri/ /index.html;
       }


        # 静态资源缓存
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
            access_log off;
        }

        # HTML 文件不缓存
        location ~* \.html$ {
            expires -1;
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header Pragma "no-cache";
        }

        # API 代理（可选，如果需要代理到后端）
        location /api/ {
            proxy_pass http://SubSystemServer:8100/api/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_connect_timeout 30s;
            proxy_send_timeout 30s;
            proxy_read_timeout 30s;
        }

        # OAuth 代理
        location /auth/ {
            proxy_pass http://SubSystemServer:8100/auth/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }

        # SPA 路由支持
        location / {
            try_files $uri $uri/ /index.html;
        }

        # 健康检查
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # 安全配置
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }
    }
~