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

    # 前端静态资源
    location / {
        try_files $uri $uri/ /index.html;
    }

    # API 代理到后端
    location /api/ {
        proxy_pass http://backend:8037;
        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;
        proxy_read_timeout 300s;
        proxy_connect_timeout 60s;
    }

    # WebSocket 代理
    location /ws/ {
        proxy_pass http://backend:8037;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # 健康检查
    location /health {
        return 200 "OK";
    }
}