all:
  hosts:
    sovereign:
      ansible_host: "{{ lookup('env', 'SOVEREIGN_HOST') | default('your-server-ip') }}"
      ansible_user: "{{ lookup('env', 'SOVEREIGN_USER') | default('ubuntu') }}"
      ansible_ssh_private_key_file: "{{ lookup('env', 'SOVEREIGN_SSH_KEY') | default('~/.ssh/id_rsa') }}"