fix(log): Allow log without any provider

log/log.go

@@ -66,7 +66,7 @@ func InitFromCustomConfig(c *ConfigStruct) (*logrus.Logger, error) {
 
 	level, err := logrus.ParseLevel(*c.Level)
 	if err != nil {
-		return nil, err
+		return nil, errors.Trace(err)
 	}
 
 	// init logger
@@ -94,7 +94,7 @@ func InitFromCustomConfig(c *ConfigStruct) (*logrus.Logger, error) {
 			}
 			log.AddHook(hook)
 		case ProviderName_NONE:
-			fallthrough
+			// Do nothing, None can be use in case of StdOut Only.
 		default:
 			return nil, errors.BadRequestf("Provider is not handled.")
 		}