Fix: Repair the logic for obtaining the configuration file path.

Fixed the logic for obtaining the configuration file path to ensure that config.json is used as the default when no command line arguments are provided.

main.go

@@ -49,7 +49,13 @@ type config struct {
 }
 
 func readConfig() *config {
-	content, err := os.ReadFile("config.json")
+	var configPath string
+	if len(os.Args) > 1 {
+		configPath = os.Args[1]
+	} else {
+		configPath = "config.json"
+	}
+	content, err := os.ReadFile(configPath)
 	if nil != err {
 		log.Fatal(err)
 	}