I'm using the node-telegram-bot-api module,
How can I make my keyboard to inline Keyboard?
This is my code:

bot.onText(/^/start$/, function (msg) {

    const opts = {

        reply_to_message_id: msg.message_id,

        reply_markup: {

            resize_keyboard: true,

            one_time_keyboard: true,

            keyboard: [ ['Level 1'] ]

        }

    };



    bot.sendMessage(msg.chat.id, I'm a test robot, opts);

});