GenerateRandomString borrowed from here https://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-go.

GetConfig returns a Kubernetes config.

IsAlertEqual compares two AlertRule objects for equality.

NewConfig creates a Config struct, populating it with values from command-line flags and environment variables.

ParseDuration turns a duration string (example: 5m, 1h) into an int64 value.

# of letter indices fitting in 63 bits.

Config holds all the configuration needed for the application to run.