env/prod: Collect common tempates in module

In order to simplify the process of adding new template render
instructions to all hosts, I've created a list of templates in the
`env/prod` module.  This way, I only have to add templates there, and
all hosts that "inherit" from it will automatically get them.

env/prod/instructions.cue

@@ -0,0 +1,13 @@
+package prod
+
+import (
+	"list"
+
+	"du5t1n.me/cfg/app/ssh"
+	"du5t1n.me/cfg/app/sudo"
+)
+
+templates: list.Concat([
+	ssh.templates,
+	sudo.templates,
+])

instructions/k8s-amd64-n3.pyrocufflink.blue.cue

@@ -1,9 +1,9 @@
 import (
 	"list"
 
-	"du5t1n.me/cfg/app/sudo"
+	"du5t1n.me/cfg/env/prod"
 )
 
 render: list.Concat([
-	sudo.templates,
+	prod.templates,
 ])

instructions/nut0.pyrocufflink.blue.cue

@@ -5,8 +5,7 @@ import (
 
 	"du5t1n.me/cfg/app/collectd"
 	"du5t1n.me/cfg/app/nut"
-	"du5t1n.me/cfg/app/ssh"
-	"du5t1n.me/cfg/app/sudo"
+	"du5t1n.me/cfg/env/prod"
 )
 
 render: list.Concat([
@@ -14,6 +13,5 @@ render: list.Concat([
 	nut.templates,
 	nut.monitor.templates,
 	nut.collectd.templates,
-	ssh.templates,
-	sudo.templates,
+	prod.templates,
 ])

instructions/nvr1.pyrocufflink.blue.cue

@@ -4,13 +4,11 @@ import (
 	"list"
 
 	"du5t1n.me/cfg/app/nut"
-	"du5t1n.me/cfg/app/ssh"
-	"du5t1n.me/cfg/app/sudo"
+	"du5t1n.me/cfg/env/prod"
 )
 
 render: list.Concat([
 	nut.sysusers.templates,
 	nut.monitor.templates,
-	ssh.templates,
-	sudo.templates,
+	prod.templates,
 ])

instructions/serial1.pyrocufflink.blue.cue

@@ -4,12 +4,10 @@ import (
 	"list"
 
 	"du5t1n.me/cfg/app/collectd"
-	"du5t1n.me/cfg/app/ssh"
-	"du5t1n.me/cfg/app/sudo"
+	"du5t1n.me/cfg/env/prod"
 )
 
 render: list.Concat([
 	collectd.templates,
-	ssh.templates,
-	sudo.templates,
+	prod.templates,
 ])