fix: Check for missing arguments and exit gracefully

main.go

@@ -34,6 +34,12 @@ Examples:
 		fmt.Fprintf(flag.CommandLine.Output(), helpMsg, exeName)
 	}
 
+	// Show help and exit if no arguments are provided
+	if len(os.Args) <= 1 {
+		flag.Usage()
+		os.Exit(1)
+	}
+
 	// Name, default val, help
 	m := flag.String("m", "get", "Method for the request.")