location /iot {
        rewrite ^/iot/(.*)$ /$1 break;
        proxy_pass http://10.19.41.4:8000;
        proxy_set_header Host $proxy_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Real-PORT $remote_port;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        expires 7d;
    }