worker_processes 1;

events {
    worker_connections 1024;
}

http {
  include mime.types;
  default_type application/octet-stream;

  sendfile on;

  server {
    listen 5000;
    server_name _;
    client_max_body_size 20M;

    # 静态资源和前端页面
    location / {
      root /usr/share/nginx/html;
      try_files $uri $uri/ /index.html;
      index index.html;

      # CORS
      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
      if ($request_method = 'OPTIONS') {
        add_header 'Access-Control-Max-Age' 1728000;
        add_header 'Content-Type' 'text/plain charset=UTF-8';
        add_header 'Content-Length' 0;
        return 204;
      }
    }

    # 代理 API 请求到后端容器
    location /admin-api/ {
      proxy_pass http://alert-backend:48080;
      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_set_header X-Forwarded-Proto $scheme;
    }

    error_page 500 502 503 504 /50x.html;

    location = /50x.html {
      root /usr/share/nginx/html;
    }
  }
}