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

manuscript/recipes/keycloak.md

@@ -2,11 +2,6 @@
 
 [KeyCloak](https://www.keycloak.org/) is "_an open source identity and access management solution_". Using a local database, or a variety of backends (_think [OpenLDAP](/recipes/openldap/)_), you can provide Single Sign-On (SSO) using OpenID, OAuth 2.0, and SAML. KeyCloak's OpenID provider can be used in combination with [Traefik Forward Auth](/ha-docker-swarm/traefik-forward-auth/), to protect [vulnerable services](/recipes/autopirate/nzbget/) with an extra layer of authentication.
 
-!!! important
-Initial development of this recipe was sponsored by [The Common Observatory](https://www.observe.global/). Thanks guys!
-
-    [![Common Observatory](../images/common_observatory.png)](https://www.observe.global/)
-
 ![KeyCloak Screenshot](../images/keycloak.png)
 
 ## Ingredients
@@ -68,8 +63,7 @@ BACKUP_FREQUENCY=1d
 
 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'
@@ -138,9 +132,4 @@ Launch the KeyCloak stack by running `docker stack deploy keycloak -c <path -to-
 
 Log into your new instance at https://**YOUR-FQDN**, and login with the user/password you defined in `keycloak.env`.
 
-!!! important
-Initial development of this recipe was sponsored by [The Common Observatory](https://www.observe.global/). Thanks guys!
-
-    [![Common Observatory](../images/common_observatory.png)](https://www.observe.global/)
-
-## Chef's Notes
+--8<-- "recipe-footer.md"