换logo，优化加载顺序

public/index.html

@@ -45,7 +45,7 @@
     <script src="<%= VUE_APP_STATIC_DIR %>/js/manage.js"></script>
     <!-- <script src="<%= VUE_APP_STATIC_DIR %>/js/overlay.js"></script> -->
     <script src="<%= VUE_APP_STATIC_DIR %>/js/Hot.js"></script>  
-    <script src="<%= VUE_APP_STATIC_DIR %>/js/main_2020_show.js"></script>
+    <script src="<%= VUE_APP_STATIC_DIR %>/js/main_2020_show.js" defer></script>
     <script src="<%= VUE_APP_STATIC_DIR %>/js/lib/OBJLoader.js"></script>
     <!-- <script src="<%= VUE_APP_STATIC_DIR %>/js/CAD/bundle.js"></script> -->
     <script src="<%= VUE_APP_STATIC_DIR %>/js/loadCAD.js"></script>