Post method trow an Preflight not successful response
This is the right cors.config configuration:     

 cors.config:
        enabled: true
        # Specify allowed headers, like 'x-allowed-header'.
        allowedHeaders: ['*']
        # Specify allowed request methods, specify ['*'] to allow all possible ones.
        allowedMethods: ['*']
        # Configure requests allowed from specific origins.
        allowedOrigins: ['*']