1. inisialisasi backend golang

backend/pkg/config/config.go

@@ -0,0 +1,47 @@
+package config
+
+import (
+	"log"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/spf13/viper"
+)
+
+type Reader interface {
+	Get(key string) string
+}
+
+type viperConfigReader struct {
+	viper *viper.Viper
+}
+
+var Data *viperConfigReader
+
+func (v viperConfigReader) Get(key string) string {
+	return v.viper.GetString(key)
+}
+
+func (v viperConfigReader) GetInt(key string) int {
+	return v.viper.GetInt(key)
+}
+
+func Load() {
+	v := viper.New()
+	v.AddConfigPath(".")
+	v.SetConfigName("config")
+	v.SetConfigType("yaml")
+	v.AutomaticEnv()
+
+	err := v.ReadInConfig()
+	if err != nil {
+		return
+	}
+	Data = &viperConfigReader{
+		viper: v,
+	}
+	v.WatchConfig()
+	v.OnConfigChange(func(e fsnotify.Event) {
+		log.Println("config file changed", e.Name)
+	})
+	return
+}