title: telegraf.js bot does not respond in group
body: <p>I use very basic Telegram bot. The response are working very well when directly message to bot. At the same time the bot only respond for commands in the group. </p>
  
  <p><strong>Is there any option to work all the bot features with in group ?</strong></p>
  
  <pre><code>const config = require('./config.json')
  const Telegraf = require('telegraf')
  const bot = new Telegraf(config.token);
  
  
  bot.start((ctx) =&gt; ctx.reply('Welcome'))
  bot.help((ctx) =&gt; ctx.reply('Send me a sticker'))
  bot.on('sticker', (ctx) =&gt; ctx.reply(''))
  bot.hears('hi', (ctx) =&gt; ctx.reply('Hey there'))
  bot.hears(/buy/i, (ctx) =&gt; ctx.reply('Buy-buy'))
  
  bot.command('oldschool', (ctx) =&gt; ctx.reply('Hello'))
  bot.command('modern', ({ reply }) =&gt; reply('Yo'))
  bot.command('hipster', Telegraf.reply('λ'))
  
  
  bot.startPolling()
  </code></pre>