server {
  listen 80;
  client_max_body_size 200m;
  # 地址为占位默认值(127.0.0.11=Docker 内嵌 DNS);镜像 entrypoint 启动时会按
  # /etc/resolv.conf 的首个 nameserver 重写本行,兼容 podman aardvark-dns。
  resolver 127.0.0.11 valid=10s;

  location /api/ {
    set $api_upstream http://api:8080;   # 变量式 → 每次按 DNS 解析,scale 后轮询到新副本(spec §11)
    proxy_pass $api_upstream;            # 无 URI 部分:保留 /api 前缀转发
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }

  location / {
    root /usr/share/nginx/html;
    try_files $uri /index.html;
  }
}