ssh keys: append instead of overwrite

Signed-off-by: Frank Villaro-Dixon <frank@villaro-dixon.eu>

tasks/auth.yml

@@ -6,10 +6,9 @@
     owner: root
     group: root
 
-- name: Ensure authorized_keys keys
-  copy:
-    dest: /root/.ssh/authorized_keys
-    content: "{{ vars.ssh_keys | join('\n') }}"
-    owner: root
-    group: root
-    mode: '0600'
+- name: Add SSH authorized keys
+  ansible.posix.authorized_key:
+    user: root
+    key: "{{ item }}"
+    state: present
+  with_items: "{{ vars.ssh_keys }}"