Pull jquery script local. Add Ko-fi button.

Add integrity values to CSS and JS files.

default.hbs

@@ -11,7 +11,18 @@
 
     {{!-- Theme assets - use the {asset} helper to reference styles & scripts,
     this will take care of caching and cache-busting automatically --}}
-    <link rel="stylesheet" type="text/css" href="{{asset "built/screen.css"}}" />
+    <link 
+      rel="stylesheet" 
+      type="text/css" 
+      href="{{asset "built/screen.css"}}"
+      integrity="sha256-2l5cwMuCBQRU/srZKHttk1BMLTWpxpmy38/KvszGjRQ=" />
+  
+    {{!-- Ko-fi Widget script --}}
+    <script 
+      type="text/javascript" 
+      src="{{asset "js/lib/ko-fi-widget_v2.js"}}" 
+      integrity="sha256-vIzHU2v5TQMAT6IcQFoigYePsSlqYanf61XMJ6U8bKE="
+    ></script>
 
     {{!-- This tag outputs all your advanced SEO meta, structured data, and other important settings,
     it should always be the last tag before the closing head tag --}}
@@ -53,6 +64,7 @@
                     {{#if @site.twitter}}
                         <a class="gh-social-link gh-social-twitter" href="{{twitter_url @site.twitter}}" title="Twitter" target="_blank" rel="me noopener">{{> "icons/twitter"}}</a>
                     {{/if}}
+                    <script type='text/javascript'>kofiwidget2.init('Buy me a coffee', '#0a0b0c', 'K3K0G2FVA');kofiwidget2.draw();</script> 
                 </div>
                 {{#if @site.members_enabled}}
                     {{#unless @member}}
@@ -87,11 +99,14 @@
 
 {{!-- Scripts - handle member signups, responsive videos, infinite scroll, floating headers, and galleries --}}
 <script
-    src="https://code.jquery.com/jquery-3.5.1.min.js"
-    integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0="
-    crossorigin="anonymous">
+    src="{{asset "js/lib/jquery-3.5.1.min.js"}}"
+    integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=">
 </script>
-<script src="{{asset "built/casper.js"}}"></script>
+<script 
+  src="{{asset "built/casper.js"}}"
+  integrity="sha256-fYSmAq1sXUPZ7kf709oLgEa58NkM60ut+VNQJpnb10g=">
+</script>
+
 <script>
 $(document).ready(function () {
     // Mobile Menu Trigger