Summarize size and number of files on an S3 bucket
Usage: python3 -m cki.monitoring_tools.check_s3_bucket_size
    [--quota SIZE]
    [--threshold SIZE]

The Bucket specification needs to be given as the name of an environment variable like


The exit code will be non-zero if the total size of all objects in the bucket (in GB) exceeds the given threshold.

When a quota (in GB) is specified, the output includes the relative usage.