add:partial functionality

internal/services/services_store.go

@@ -1,5 +1,7 @@
 package services
 
+import "fmt"
+
 type ServicesStore struct {
 	Config *ConfigService
 }
@@ -11,3 +13,11 @@ func NewServicesStore() (*ServicesStore, error) {
 	}
 	return &ServicesStore{Config: cfg}, nil
 }
+
+func (s *ServicesStore) NewStorageService(serverName string) (*StorageService, error) {
+	srv, ok := s.Config.servers[serverName]
+	if !ok {
+		return nil, fmt.Errorf("server %q not found", serverName)
+	}
+	return NewStorageService(srv), nil
+}