Debug level logging.

Debugf does debug level logging similar to fmt.Printf.

Error level logging.

Errorf does error level logging similar to fmt.Printf.

Fatal level logging.

Fatalf does fatal level logging similar to fmt.Printf.

Info level logging.

Infof does info level logging similar to fmt.Printf.

LogRequest reads and logs the request body and resets the body to original state.

Setup sets up the logger initially.