feat: fix lint & suggestion

Signed-off-by: NucleoFusion <lakshit.singh.mail@gmail.com>

Author: NucleoFusion

cmd/harbor/root/cmd.go

@@ -70,6 +70,10 @@ harbor help
 			// Initialize configuration
 			utils.InitConfig(cfgFile, userSpecifiedConfig)
 
+			if logFormat != "json" && logFormat != "text" {
+				return fmt.Errorf("invalid log-format: %s, log-format can be one of: json|text", logFormat)
+			}
+
 			// Sets up logging
 			logger.Setup(verbose, logFormat)