server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # 前端路由支持（SPA 应用）
    location / {
        try_files $uri $uri/ /index.html;
    }

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

    # API 代理到后端（按需配置）
    location /api/ {
        proxy_pass http://backend:8080/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;
    }

    # 禁止访问隐藏文件
    location ~ /\. {
        deny all;
    }
}