Unhandled rejection Error: ETELEGRAM: 400 Bad Request: bad webhook: getaddrinfo: Name or service not known

[naorye]

After deployed to Heroku, the bot didn't work.
Logs show this:
2018-05-16T16:50:12.717473+00:00 heroku[web.1]: Starting process with command node index.js
2018-05-16T16:50:16.046896+00:00 heroku[web.1]: State changed from starting to up
2018-05-16T16:50:15.722823+00:00 app[web.1]: Wed, 16 May 2018 16:50:15 GMT node-telegram-bot-api deprecated Automatic enabling of cancellation of promises is deprecated.
2018-05-16T16:50:15.722867+00:00 app[web.1]: In the future, you will have to enable it yourself.
2018-05-16T16:50:15.722869+00:00 app[web.1]: See yagop/node-telegram-bot-api#319. at module.js:652:30
2018-05-16T16:50:15.748871+00:00 app[web.1]: Bot server started in the production mode
2018-05-16T16:50:15.969839+00:00 app[web.1]: Web server started at http://0.0.0.0:49695
2018-05-16T16:50:16.467149+00:00 app[web.1]: Unhandled rejection Error: ETELEGRAM: 400 Bad Request: bad webhook: getaddrinfo: Name or service not known
2018-05-16T16:50:16.467188+00:00 app[web.1]: at request.then.resp (/app/node_modules/node-telegram-bot-api/src/telegram.js:280:15)
2018-05-16T16:50:16.467190+00:00 app[web.1]: at tryCatcher (/app/node_modules/bluebird/js/release/util.js:16:23)
2018-05-16T16:50:16.467191+00:00 app[web.1]: at Promise._settlePromiseFromHandler (/app/node_modules/bluebird/js/release/promise.js:512:31)
2018-05-16T16:50:16.467193+00:00 app[web.1]: at Promise._settlePromise (/app/node_modules/bluebird/js/release/promise.js:569:18)
2018-05-16T16:50:16.467195+00:00 app[web.1]: at Promise._settlePromise0 (/app/node_modules/bluebird/js/release/promise.js:614:10)
2018-05-16T16:50:16.467196+00:00 app[web.1]: at Promise._settlePromises (/app/node_modules/bluebird/js/release/promise.js:693:18)
2018-05-16T16:50:16.467198+00:00 app[web.1]: at Async._drainQueue (/app/node_modules/bluebird/js/release/async.js:133:16)
2018-05-16T16:50:16.467199+00:00 app[web.1]: at Async._drainQueues (/app/node_modules/bluebird/js/release/async.js:143:10)
2018-05-16T16:50:16.467201+00:00 app[web.1]: at Immediate.Async.drainQueues (/app/node_modules/bluebird/js/release/async.js:17:14)
2018-05-16T16:50:16.467203+00:00 app[web.1]: at runCallback (timers.js:810:20)
2018-05-16T16:50:16.467204+00:00 app[web.1]: at tryOnImmediate (timers.js:768:5)
2018-05-16T16:50:16.467206+00:00 app[web.1]: at processImmediate [as _immediateCallback] (timers.js:745:5)