Add ecs metadata fields to logger

[applike-ss]

If available, we want to add the ecs metadata fields to the logger.

This adds e.g. the instance id and task definition revision which should help debugging things.

I would suggest these fields to be added:

• TaskDefinitionFamily as fields.aws.task_definition.family (e.g. project-env-family-appGroup-appName)
• TaskDefinitionRevision as fields.aws.task_definition.revision (e.g. 123)
• ContainerID as fields.container.id (e.g. 65c751452f5c8bef0304ff96dba3fcaa0f49a421d74c86aad95789f68d8c566d)
• ImageName as fields.container.imageName (e.g. accountId.dkr.ecr.region.amazonaws.com/project/family/appGroup-appName:ciRefName-ciCommitSha)
• AvailabilityZone as fields.cloud.availability_zone (e.g. eu-central-1a)
• HostPrivateIPv4Address as fields.instance.ip (e.g. 10.1.2.3)