feat: add docker env vars start server

pkg/setting/setting.go

@@ -2,6 +2,7 @@ package setting
 
 import (
 	"log"
+	"os"
 	"time"
 
 	"github.com/go-ini/ini"
@@ -43,17 +44,30 @@ var DatabaseSetting = &Database{}
 
 var cfg *ini.File
 
+func fileExists(filePath string) bool {
+	_, err := os.Stat(filePath)
+	return !os.IsNotExist(err)
+}
+
 // Setup initialize the configuration instance
 func Setup() {
 	var err error
-	cfg, err = ini.Load("conf/app.ini")
-	if err != nil {
-		log.Fatalf("setting.Setup, fail to parse 'conf/app.ini': %v", err)
-	}
+	intPath := "conf/app.ini"
 
-	mapTo("app", AppSetting)
-	mapTo("server", ServerSetting)
-	mapTo("database", DatabaseSetting)
+	if fileExists(intPath) {
+		log.Printf("[message-nest] start server from %s.", intPath)
+		cfg, err = ini.Load(intPath)
+		if err != nil {
+			log.Fatalf("[message-nest] setting.Setup, fail to parse 'conf/app.ini': %v", err)
+		}
+
+		mapTo("app", AppSetting)
+		mapTo("server", ServerSetting)
+		mapTo("database", DatabaseSetting)
+	} else {
+		log.Printf("[message-nest] %s is not exists, start server from env vars.", intPath)
+		loadConfigFromEnv()
+	}
 
 	ServerSetting.ReadTimeout = ServerSetting.ReadTimeout * time.Second
 	ServerSetting.WriteTimeout = ServerSetting.WriteTimeout * time.Second
@@ -63,6 +77,6 @@ func Setup() {
 func mapTo(section string, v interface{}) {
 	err := cfg.Section(section).MapTo(v)
 	if err != nil {
-		log.Fatalf("Cfg.MapTo %s err: %v", section, err)
+		log.Fatalf("[message-nest] Cfg.MapTo %s err: %v", section, err)
 	}
 }