Serve Nikola assets.

    This is meant to be used ONLY by the internal dev server.
    Please configure your web server to handle requests to this URL::

        /assets/ => output/assets

def serve_assets(path):
    """Serve Nikola assets.

    This is meant to be used ONLY by the internal dev server.
    Please configure your web server to handle requests to this URL::

        /assets/ => output/assets
    """
    res = os.path.join(app.config['NIKOLA_ROOT'],
                       _site.config["OUTPUT_FOLDER"], 'assets')
    return send_from_directory(res, path)