Container web is missing required parameter "image".

I want to convert Docker compose file to JSON file by using:
cat docker-compose.prod.yml | container-transform -v command.
For the services with the image parameter is works, but for the services with build parameter gives this error.

Successful:

db:
        image: postgres

Failed:

 db:
        build: 
            context: .
            dockerfile: Dockerfile

How can I solve this problem?