api_gateway_register.go

	// Register the function with the API Gateway
	apiStage := sparta.NewStage("v1")
	apiGateway := sparta.NewAPIGateway("SpartaHTML", apiStage)
	// Enable CORS s.t. the S3 site can access the resources
	apiGateway.CORSOptions = &sparta.CORSOptions{
		Headers: map[string]interface{}{
			"Access-Control-Allow-Headers": "Content-Type,X-Amz-Date,Authorization,X-Api-Key",
			"Access-Control-Allow-Methods": "*",
			"Access-Control-Allow-Origin":  gocf.GetAtt(s3Site.CloudFormationS3ResourceName(), "WebsiteURL"),
		},
	}