fix: enable assume_ssl for SSL-terminating reverse proxy

Author: jaspermayone

config/environments/production.rb

@@ -25,7 +25,7 @@
   config.active_storage.service = :local
 
   # Assume all access to the app is happening through a SSL-terminating reverse proxy.
-  # config.assume_ssl = true
+  config.assume_ssl = true
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true