backend moved to separate directory

backend: deleted the old structure

go-backend/internal/services/bank_account_service.go

@@ -0,0 +1,12 @@
+package services
+
+import (
+	"GoMembership/internal/repositories"
+)
+
+type BankAccountServiceInterface interface {
+}
+
+type BankAccountService struct {
+	Repo repositories.BankAccountRepositoryInterface
+}