feat #4: add storage config in config file

polyculeconnect/main.go

@@ -41,7 +41,7 @@ func initStorage(conf *config.AppConfig) (storage.Storage, error) {
 	case "memory":
 		storageType = memory.New(logger.L)
 	default:
-		return storageType, fmt.Errorf("Unsupported storage backend type: %s", conf.StorageType)
+		return storageType, fmt.Errorf("unsupported storage backend type: %s", conf.StorageType)
 	}
 	return storageType, nil
 }