Update welcome.php

Author: ellermister

view/welcome.php

@@ -5,8 +5,7 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     <title>GENERATE SHORT URL</title>
-    <link rel="stylesheet" href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.0.0/css/bootstrap.min.css"
-          integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/css/editormd.min.css"/>
     <style type="text/css">
         .hidden {
@@ -186,14 +185,10 @@
 </div>
 
 
-<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/jquery@3.2.1/dist/jquery.min.js"></script>
 
-<script src="https://cdn.bootcss.com/popper.js/1.12.9/umd/popper.min.js"
-        integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
-        crossorigin="anonymous"></script>
-<script src="https://cdn.bootcss.com/twitter-bootstrap/4.0.0/js/bootstrap.min.js"
-        integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
-        crossorigin="anonymous"></script>
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"></script>
 <script src="https://cdn.jsdelivr.net/npm/[email protected]/editormd.min.js"></script>
 <script type="text/html" id="tpl-alert">
     <div class="alert alert-{{status}} alert-dismissible fade show" role="alert">