feat(docker): Added cadvisor on all hosts, added docker metric exporter, added docker compose restart as handler, moved repetetive directory/permission creation into loops, moved repetetive values into variables, cleanup compose template for better empty lines

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

group_vars/all/vars.yml

@@ -2,6 +2,7 @@
 # Essential
 #
 
+root: root
 user: tudattr
 timezone: Europe/Berlin
 puid: "1000"