Merge pull request #1094 from oceanbase/dengfuping-dev

improve(ui): Login bg image should align center

Author: dengfuping

packages/ui/src/Login/index.less

@@ -15,6 +15,7 @@
     height: 100%;
     background-repeat: no-repeat;
     background-size: cover;
+    background-position: center;
 
     .@{prefix}-info {
       margin: 185px 48px 0 48px;