Make better use of markdown snippets

manuscript/recipes/realms.md

@@ -20,11 +20,7 @@ Features include:
 
     Also of note is that the docker image is 1.17GB in size, and the handful of commits to the [source GitHub repo](https://github.com/scragg0x/realms-wiki/commits/master)  in the past year has listed TravisCI build failures. This has many of the hallmarks of an abandoned project, to my mind.
 
-## Ingredients
-
-1. [Docker swarm cluster](/ha-docker-swarm/design/) with [persistent shared storage](/ha-docker-swarm/shared-storage-ceph.md)
-2. [Traefik](/ha-docker-swarm/traefik) configured per design
-3. DNS entry for the hostname you intend to use, pointed to your [keepalived](/ha-docker-swarm/keepalived/) IP
+--8<-- "recipe-standard-ingredients.md"
 
 ## Preparation
 
@@ -93,10 +89,7 @@ networks:
         - subnet: 172.16.35.0/24
 ```
 
-!!! note
-    Setup unique static subnets for every stack you deploy. This avoids IP/gateway conflicts which can otherwise occur when you're creating/removing stacks a lot. See [my list](/reference/networks/) here.
-
-
+--8<-- "reference-networks.md"
 
 ## Serving