Kong Proxy aws s3 frontend and custom path for backend

Hello guys, currently we have a requirement to migrate our frontend service from cloudfront to kong to serve bucket S3.

I had no success configuring services and routes

My desired state is:

mywebsite.com/ → serve bucket s3 content (/index.html)

mywebsite.com/api → api request to another subdomain like api.mybackend.com (preserving mywebsite.com host)

is that possible ?