Add authentik, tidy up recipe-footer

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

docs/recipes/gollum.md

@@ -109,4 +109,4 @@ Launch the Gollum stack by running ```docker stack deploy gollum -c <path-to-doc
 
 [^1]: In the current implementation, Gollum is a "single user" tool only. The contents of the wiki are saved as markdown files under /var/data/gollum, and all the git commits are currently "Anonymous"
 
---8<-- "recipe-footer.md"
+{% include 'recipe-footer.md' %}