Fix service.json location + add logging according to K8S/GKE best practices
Fix service.json location + add logging according to K8S/GKE best practices

GoogleCloudPlatform/endpoints-samples,GoogleCloudPlatform/endpoints-samples,GoogleCloudPlatform/endpoints-samples,GoogleCloudPlatform/endpoints-samples,GoogleCloudPlatform/endpoints-samples,GoogleCloudPlatform/endpoints-samples