Update main.html

Add newsletter signup

Author: fjp

docs/custom_theme/main.html

@@ -60,6 +60,16 @@
     "theme": "classic"
     });
     </script>
+    <!-- newsletter -->
+    <!-- MailerLite Universal -->
+    <script>
+        (function(w,d,e,u,f,l,n){w[f]=w[f]||function(){(w[f].q=w[f].q||[])
+        .push(arguments);},l=d.createElement(e),l.async=1,l.src=u,
+        n=d.getElementsByTagName(e)[0],n.parentNode.insertBefore(l,n);})
+        (window,document,'script','https://assets.mailerlite.com/js/universal.js','ml');
+        ml('account', '1518166');
+    </script>
+    <!-- End MailerLite Universal -->
 {% endblock scripts %}