Have been working for a few hours on AWS API Gateway and LINE BOT, however, I noticed LINE BOT is having problem calling API Gateway, there is no access log in CloudWatch Logs from AWS Lambda.
However, if I run my docker web service in AWS ECS behind ELB with my RapidSSL certificate attached onto ELB, it works like a charm!
I have tried to attach the same RapidSSL certificate to AWS API Gateway Custom Domain Name but still no luck. I believe the certificate is good. LINE BOT should have some problem visiting API Gateway
I do hope LINE Corp can help on this, as it is very important to build LINE BOT in a serverless fashion.
UPDATE:
Issue solved, please check here