Add footer banner message support

src/invidious/config.cr

@@ -106,6 +106,8 @@ class Config
   property cache_annotations : Bool = false
   # Optional banner to be displayed along top of page for announcements, etc.
   property banner : String? = nil
+  # Optional footer banner to be displayed along the bottom of the page. Can be used for maintainer contact info, etc.
+  property footer : String? = nil
   # Enables 'Strict-Transport-Security'. Ensure that `domain` and all subdomains are served securely
   property hsts : Bool? = true
   # Disable proxying server-wide: options: 'dash', 'livestreams', 'downloads', 'local'

src/invidious/views/template.ecr

@@ -153,6 +153,11 @@
                         <span><%= translate(locale, "Current version: ") %> <%= CURRENT_VERSION %>-<%= CURRENT_COMMIT %> @ <%= CURRENT_BRANCH %></span>
                     </div>
                 </div>
+            <% if CONFIG.footer %>
+            <div>
+               <h4 style="text-align: center;"><%= CONFIG.footer %></h3>
+            </div>
+            <% end %>
             </footer>
 
         </div>