Use mkdocs snippets to template common content blocks (#135)

manuscript/recipes/duplicati.md

@@ -2,7 +2,7 @@ hero: Duplicati - Yet another option to backup your exciting stuff. It's good to
 
 # Duplicati
 
-Always have a backup plan<sup>1<sup>
+Always have a backup plan[^1]
 
 ![duplicati Screenshot](../images/duplicati.jpg)
 
@@ -57,8 +57,7 @@ CLI_ARGS= #optional
 
 Create a docker swarm config file in docker-compose syntax (v3), something like this:
 
-!!! tip
-        I share (_with my [sponsors](https://github.com/sponsors/funkypenguin)_) a private "_premix_" git repository, which includes necessary docker-compose and env files for all published recipes. This means that sponsors can launch any recipe with just a ```git pull``` and a ```docker stack deploy``` 👍
+--8<-- "premix-cta.md"
 
 ```
 version: "3"
@@ -113,8 +112,7 @@ Once we authenticate through the traefik-forward-auth provider, we can start con
 !!! tip
     Backing up files on a regular basis is going to use a continually-increasing amount of disk space. To help with this, Duplicati offers a "Smart Backup Retention" scheme that will intelligently remove certain backups as they age while still maintaining a comprehensive backup history. You can set that configuration on the "Options" tab of the backup configuration.
 
+[^1]: Quote attributed to Mila Kunis
+[^2]: The [Duplicati 2 User's Manual](https://duplicati.readthedocs.io/en/latest/) contains all the information you'll need to configure backup endpoints, restore jobs, scheduling and advanced properties for your backup jobs.
 
-## Chef's Notes  📓
-
-1. Quote attributed to Mila Kunis
-2. The [Duplicati 2 User's Manual](https://duplicati.readthedocs.io/en/latest/) contains all the information you'll need to configure backup endpoints, restore jobs, scheduling and advanced properties for your backup jobs.
+--8<-- "recipe-footer.md"