Add raccoon peer to wireguard

It routes traffic from fox, apex and the compute nodes so that we can
reach the git servers and tent.

Reviewed-by: Aleix Boné <abonerib@bsc.es>

secrets/secrets.nix

@@ -4,6 +4,7 @@ let
   hut = [ keys.hosts.hut ] ++ adminsKeys;
   fox = [ keys.hosts.fox ] ++ adminsKeys;
   apex = [ keys.hosts.apex ] ++ adminsKeys;
+  raccoon = [ keys.hosts.raccoon ] ++ adminsKeys;
   mon = [ keys.hosts.hut keys.hosts.tent ] ++ adminsKeys;
   tent = [ keys.hosts.tent ] ++ adminsKeys;
   # Only expose ceph keys to safe nodes and admins
@@ -29,4 +30,5 @@ in
 
   "wg-fox.age".publicKeys = fox;
   "wg-apex.age".publicKeys = apex;
+  "wg-raccoon.age".publicKeys = raccoon;
 }