private function printServerFinger()
    {
        $version       = $this->version;
        $software      = SERVER_MODE === 'swoole' ? 'Swoole Server' : 'PHP Development Server';
        $document_root = APP_PATH . '/public';

        echo <<<EOT
-----------------------------------\033[32m
      ____    __  __  ____
     /\  _`\ /\ \/\ \/\  _`\
   __\ \ \ \ \ \ \_\ \ \ \ \ \
 /'__`\ \ ,__/\ \  _  \ \ ,__/
/\  __/\ \ \   \ \ \ \ \ \ \
\ \____ \\ \_\   \ \_\ \_\ \_\
 \/____/ \/_/    \/_/\/_/\/_/ \033[43;37mv{$version}\033[0m
 \033[0m
>>> \033[35m{$software}\033[0m started ...
Listening on \033[36;4mhttp://{$this->config['host']}:{$this->config['port']}/\033[0m
Document root is \033[34m{$document_root}\033[0m
Press Ctrl-C to quit.
-----------------------------------

EOT;

        echo "\033[32m>>> Http Server is enabled\033[0m \n";
        if ( !empty($this->config['enable_websocket']) ) {
            echo "\033[32m>>> WebSocket Server is enabled\033[0m \n";
        }
        echo "-----------------------------------\n";
    }