Add support details

manuscript/recipies/portainer.md

@@ -68,4 +68,8 @@ Log into your new instance at https://**YOUR-FQDN**. You'll be prompted to set y
 
 1. I wanted to use oauth2_proxy to provide an additional layer of security for Portainer, but the proxy seems to break the authentication mechanism, effectively making the stack **so** secure, that it can't be logged into!
 
-## 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? 💬