chore: add loading

initializer-ui/src/components/BackendStarter.vue

+<!--suppress JSCheckFunctionSignatures -->
 <template>
 
   <div id="form" class="form">
@@ -36,6 +37,7 @@
 
 <script>
 import axios from '../util/request'
+import {ElMessageBox} from 'element-plus'
 
 export default {
   name: "BackendStarter",
@@ -60,17 +62,20 @@ export default {
         const blob = new Blob([data])
         const link = document.createElement('a');
         link.style.display = "none";
-        link.href = window.URL.createObjectURL(blob);
+        link.href = URL.createObjectURL(blob);
         link.download = fileName;
         document.body.appendChild(link);
         link.click();
-        window.URL.revokeObjectURL(link.href);
+        URL.revokeObjectURL(link.href);
         document.body.removeChild(link);
       }, error => {
         const reader = new FileReader();
         reader.readAsText(error.data, 'utf-8');
-        reader.onload = function (e) {
-          alert(reader.result)
+        reader.onload = function () {
+          ElMessageBox.alert(JSON.parse(reader.result).message, '提示', {
+                confirmButtonText: '确定'
+              }
+          )
         }
       })
     }