Fix mailers (#1216)

* reimplement how we handled script name for mailers and fix the production config to remove the trailing / because it was resulting in URLs with two slashes before the slug...

* change file name to see if it fixes asset missing error in production

* I am an idiot...the file name was wrong

app/views/static_pages/_donate_content.html.erb

@@ -13,7 +13,7 @@
       </div>
       <div class="col-xxl-5 offset-xxl-1 col-xl-6 col-lg-6 col-12 d-lg-flex justify-content-end">
         <div class="mt-12 mt-lg-0 position-relative">
-          <%= image_tag 'donate_new.jpeg', alt: 'pet_image', class: 'img-fluid rounded-4 w-100 z-1 position-relative' %>
+          <%= image_tag 'donate_image.jpg', alt: 'pet_image', class: 'img-fluid rounded-4 w-100 z-1 position-relative' %>
         </div>
       </div>
     </div>