old_contents: 'use strict'
  
  import bot from './telegram-bot'
  import readMD from './read-markdown'
  
  bot.onText(/^(\/start)$/, msg => {
      bot.sendMessage(msg.chat.id, readMD('start'))
  })
  
new_contents: 'use strict'
  
  import bot from './telegram-bot'
  import readMD from './read-markdown'
  
  bot.onText(/^(\/start)$/, msg => {
      bot.sendMessage(msg.chat.id, readMD('start'), {
          parse_mode: 'markdown',
          disable_web_page_preview: true,
          reply_markup: JSON.stringify({
              keyboard: [
                  ['Зарегистрироваться'],
              ],
              resize_keyboard: true,
          }),
      })
  })
  
subject: Add first button