Add open_backup.sh

Add open_backup, a script to mount the encrypted backup drive created in
arch_backup.

ansible/arch_backup/tasks/main.yml

@@ -18,6 +18,14 @@
     group: root
     mode: '0744'
   become: yes
+- name: Template open_backup.sh
+  ansible.builtin.template:
+    src: open_backup.sh.j2
+    dest: /usr/local/scripts/open_backup.sh
+    owner: root
+    group: root
+    mode: '0744'
+  become: yes
 - name: Ensure hourly backups of each item in backups
   ansible.builtin.cron:
     name: "hourly backup of {{ item }}"