there is a wrong word (webhooks[x] --> webhook[o]) in source...

[tobby2002]

After many tries and errors, i found that why there was no response in facebook messeger's mychatbot.

This was caused by the followings,

In index.js line37
app.post('/webhooks', ....
--> app.post('/webhook', ....
by this wrong url,
heroku's /webhook could not find the exact the path...

ps.
app.get('/webhooks', ....
--> app.get('/webhook', ....