p a p u a n - l i n e b o t

npm i
npm run dev

open http://localhost:3000/webhook

using ngrok open tunnel for test

ngrok http 3000

copy tunnel link and paste it on https://developers.line.biz/console/ -> Messaging API -> Webhook URL

for credentials.json credentials data go to https://console.cloud.google.com/apis/credentials and download Download OAuth client from OAuth 2.0 Client IDs section