moved ssh to cert based

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

roles/common/tasks/sshd.yml

@@ -10,8 +10,7 @@
 
 - name: Copy pubkey
   ansible.builtin.copy:
-    content: "{{ pubkey }}"
-    dest: "/home/{{ user }}/.ssh/authorized_keys"
-    owner: "{{ user }}"
-    group: "{{ user }}"
+    src: files/ssh/vault-ca.pub
+    dest: "/etc/ssh/vault-ca.pub"
     mode: "644"
+  become: true