update 404 page

package.json

@@ -4,7 +4,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve",
-    "build": "ng build --base-href 'https://devdrift.github.io/auction-ui'",
+    "build": "ng build --base-href 'https://devdrift.github.io/auction-ui/'",
     "test": "ng test",
     "lint": "ng lint",
     "e2e": "ng e2e"

src/404.html

@@ -7,7 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <link rel="icon" type="image/png" href="favicon.png">
     <link rel="icon" type="image/x-icon" href="favicon.ico">
-    <meta http-equiv="refresh" content="1;URL=https://devdrift.github.io/auction-ui" />
+    <meta http-equiv="refresh" content="1;URL=https://devdrift.github.io/auction-ui/" />
 </head>
 <style>@-webkit-keyframes spin{0%{transform:rotate(0)}100%{transform:rotate(360deg)}}@-moz-keyframes spin{0%{-moz-transform:rotate(0)}100%{-moz-transform:rotate(360deg)}}@keyframes spin{0%{transform:rotate(0)}100%{transform:rotate(360deg)}}.spinner{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1003;background: #edf1f7;overflow:hidden}  .spinner div:first-child{display:block;position:relative;left:50%;top:50%;width:150px;height:150px;margin:-75px 0 0 -75px;border-radius:50%;box-shadow:0 3px 3px 0 rgba(255,56,106,1);transform:translate3d(0,0,0);animation:spin 2s linear infinite}  .spinner div:first-child:after,.spinner div:first-child:before{content:'';position:absolute;border-radius:50%}  .spinner div:first-child:before{top:5px;left:5px;right:5px;bottom:5px;box-shadow:0 3px 3px 0 rgb(255, 228, 32);-webkit-animation:spin 3s linear infinite;animation:spin 3s linear infinite}  .spinner div:first-child:after{top:15px;left:15px;right:15px;bottom:15px;box-shadow:0 3px 3px 0 rgba(61, 175, 255,1);animation:spin 1.5s linear infinite}</style>
 <div id="nb-global-spinner" class="spinner">