fix: delete response json

server/memo.go

@@ -125,8 +125,7 @@ func (s *Server) registerMemoRoutes(g *echo.Group) {
 			return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to delete memo ID: %v", memoId)).SetInternal(err)
 		}
 
-		c.Response().Header().Set(echo.HeaderContentType, echo.MIMEApplicationJSONCharsetUTF8)
-		c.Response().WriteHeader(http.StatusOK)
+		c.JSON(http.StatusOK, true)
 
 		return nil
 	})