Added -i for Input File

main.go

@@ -18,6 +18,7 @@ var appConfig = koanf.New(".")
 func main() {
 	confPath := flag.String("c", "testdata/conf.yaml", "Config File")
 	outFileName := flag.String("o", "", "Name of the Output File")
+	inputFile := flag.String("i", "testdata/prot1.json", "Name of the Input File")
 
 	flag.Parse()
 
@@ -27,7 +28,11 @@ func main() {
 		log.Printf("CONF: %v", appConfig)
 	}
 
-	file, _ := os.ReadFile("testdata/prot1.json")
+	file, err := os.ReadFile(*inputFile)
+	if err != nil {
+		log.Printf("ERROR: %v", err)
+		return
+	}
 	var cfg proto.Proto
 	json.Unmarshal(file, &cfg)