server {
    listen       80;
    server_name  localhost;

    # 静态文件服务
    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
        # SPA 路由支持: 找不到文件时回退到 index.html
        try_files $uri $uri/ /index.html;
    }

    # 反向代理: 将 /api 请求转发给后端容器
    location /api/ {
        proxy_pass http://backend:8000/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;
    }

    # 静态资源代理 (后端生成的图片)
    location /static/ {
        proxy_pass http://backend:8000/static/;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }
}