move apt-cacher-ng to docker (#509)

Co-authored-by: Michael Grote <michael.grote@posteo.de>
Reviewed-on: #509

docker-compose/munin/docker-compose.yml.j2

@@ -17,7 +17,6 @@ services:
       CRONDELAY: 5
       NODES: |
         fileserver3.grote.lan:fileserver3.grote.lan
-        acng2.grote.lan:acng2.grote.lan
         ansible2.grote.lan:ansible2.grote.lan
         pve5.grote.lan:pve5.grote.lan
         dokuwiki2.grote.lan:dokuwiki2.grote.lan

host_vars/docker10.grote.lan.yml

@@ -288,6 +288,6 @@
         env.repo oxidized-configs
         env.user mg
         env.git_ref HEAD
-        env.warn 720
+        env.warning 720
         env.critical 2880
         env.token {{ lookup('keepass', 'gitea_commit_time_diff_oxidized_token', 'password') }}