Fix(database): Retry test database too

backend/internal/common/database.go

@@ -96,11 +96,18 @@ func TestDBInit() *gorm.DB {
 	)
 
 	dsn := fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%s sslmode=%s TimeZone=Asia/Singapore", host, user, pass, "postgres", port, sslMode)
-	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
+
+	var db *gorm.DB
+	var err error
+
+	for ok := true; ok; ok = err != nil {
+		db, err = gorm.Open(postgres.Open(dsn), &gorm.Config{
 			Logger: newLogger,
 		})
 		if err != nil {
 			fmt.Println("db err: (Init) ", err)
+			time.Sleep(1 * time.Second)
+		}
 	}
 
 	// Create Database