Add authentik, tidy up recipe-footer

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

docs/recipes/swarmprom.md

@@ -395,4 +395,4 @@ Log into your new grafana instance, check out your beautiful graphs. Move onto d
 
 [^1]: Pay close attention to the ```grafana.env``` config. If you encounter errors about ```basic auth failed```, or failed CSS, it's likely due to misconfiguration of one of the grafana environment variables.
 
---8<-- "recipe-footer.md"
+{% include 'recipe-footer.md' %}