- Docker role: replace docker-compose with docker-compose-plugin (v2).
The old docker-compose package conflicts with docker-compose-plugin
already installed on helsinki-a. Also removes the conflicting package
if present.
- firewall_alpine handler: use ansible.builtin.shell instead of
ansible.builtin.command for iptables-restore, since the redirect
operator (<) requires a shell.
Add firewall_alpine role for Alpine hosts with iptables persistence
and fail2ban SSH jails. Wire it into nuremberg-a's deploy stage.
Mail ports are already exposed via Docker port mappings in the
poste-io docker-compose — this captures the surrounding iptables
and fail2ban config that was previously undocumented.
Closes PESO-96
