Add support details

manuscript/recipies/duplicity.md

@@ -165,4 +165,8 @@ Nothing will happen. Very boring. But when the cron script fires (daily), duplic
 1. Automatic backup can still fail if nobody checks that it's running successfully. I'll be working on an upcoming recipe to monitor the elements of the stack, including the success/failure of duplicity jobs.
 2. The container provides the facility to specify an SMTP host and port, but not credentials, which makes it close to useless. As a result, I've left SMTP out of this recipe. To enable email notifications (if your SMTP server doesn't require auth), add ```SMTP_HOST```, ```SMTP_PORT```, ```EMAIL_FROM``` and ```EMAIL_TO``` variables to duplicity.env
 
-## Your comments?
+### Tip your waiter (donate) 👏
+
+Did you receive excellent service? Want to make your waiter happy? (_..and support development of current and future recipes!_) See the [support](/support/) page for (_free or paid)_ ways to say thank you! 👏
+
+### Your comments? 💬