server {
    listen ${PORT};
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # Gzip
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml;

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

    # API 代理到后端
    location /api/ {
        proxy_pass http://127.0.0.1:8081/api/;
        proxy_http_version 1.1;
        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_connect_timeout 300s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;
    }

    # 健康检查
    location /health {
        return 200 'OK';
        add_header Content-Type text/plain;
    }
}