Add link to PayPal.me

Author: zuck

_config.yml

@@ -21,6 +21,7 @@ email: [email protected]
 baseurl: "" # the subpath of your site, e.g. /blog
 url: "" # the base hostname & protocol for your site, e.g. http://example.com
 github_url: https://github.com/leaf3d/leaf3d
+paypal_url: https://paypal.me/EBertoldi
 
 # Build settings
 markdown: kramdown

_includes/contribute.html

@@ -1,10 +1,15 @@
 <div class="contribute">
   <p class="lightbox">
-    It's free and open-source.<br/>
-    So, what're you waiting for?
+    It's <strong>free</strong> and <strong>open-source</strong>.
+    <br/>
+    So, what are you waiting for?
   </p>
   <a class="btn" href="{{ site.github_url }}">
     <i class="fab fa-github"></i>
-    Let's contribute!
+    Contribute
+  </a>
+  <a class="btn" href="{{ site.paypal_url }}">
+    <i class="fab fa-paypal"></i>
+    Donate
   </a>
 </div>