server {
    listen 80;

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

    # Proxy API requests to backend
    location /api/ {
        # 'backend' is the service name in docker-compose
        # We strip the /api/ prefix if the backend doesn't expect it,
        # but in this setup the backend routes are /history, /tracks etc.
        # It's cleaner to keep /api prefix in frontend and rewrite here or configure backend to serve on /api
        # For simplicity, let's proxy /api/ to /
        rewrite ^/api/(.*) /$1 break;
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}