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

    # Gzip
    gzip on;
    gzip_vary on;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript image/svg+xml;

    # 静态资源缓存（带 hash 的文件）
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SPA history mode：所有路由 fallback 到 index.html
    location / {
        try_files $uri $uri/ /index.html;
    }
}