API : https://devdocs.line.me/en/
line-bot-sdk-python : https://github.com/line/line-bot-sdk-python
Fixie : https://elements.heroku.com/addons/fixie

1. 註冊Line Messaging API
   https://business.line.me/zh-hant/services/bot

• 記下Channel Access Token``Channel Secret

2. Deploy 到 Heroku (需先註冊Heroku帳號)
   Deploy

3. 修改app.py參數
   line_bot_api = LineBotApi('') #Your Channel Access Token
handler = WebhookHandler('') #Your Channel Secret

4. Add-ons Fixie
   https://elements.heroku.com/addons/fixie

5. 到Line developers 設定Webhook URL
https://{YOUR_HEROKU_SERVER_ID}.herokuapp.com/callback