added backup role

roles/backup/tasks/main.yml

@@ -0,0 +1,21 @@
+---
+- name: Pull Backup Repository
+  git:
+    repo: "{{ backup_repo }}"
+    dest: "{{ backup_repo_dir }}"
+    update: no
+
+- name: Ensure correct file/dir ownership
+  file:
+    path: "{{ backup_repo_dir }}"
+    recurse: True
+    owner: opal
+    group: opal
+
+- name: Copy Borgmatic Cronjob
+  copy:
+    src: borgmatic-cron
+    dest: /etc/cron.d/borgmatic
+    mode: u+x
+    owner: root
+    group: root

roles/backup/vars/main.yml

@@ -0,0 +1,4 @@
+---
+backup_repo: git@codeberg.org:opalvaults/backup.git
+
+backup_repo_dir: /home/opal/projects/backup-config