grocy: Add restic backup

roles/grocy/templates/docker-compose.yaml.j2

@@ -16,9 +16,23 @@ services:
       caddy: "{{ stack_grocy_subdomain }}"
       caddy.reverse_proxy: "{{ '{{' }}upstreams 80{{ '}}'}}"
 
+{% if restic_enable is not undefined and not false and stack_grocy_restic_enable is not undefined and not false %}
+  backup:
+    image: mazzolino/restic
+    environment:
+      TZ: "{{ restic_tz }}"
+      BACKUP_CRON: "{{ stack_grocy_restic_cron }}"
+      RESTIC_REPOSITORY: "{{ restic_repo }}"
+      RESTIC_PASSWORD: "{{ restic_pass }}"
+      AWS_ACCESS_KEY_ID: "{{ restic_s3_key }}"
+      AWS_SECRET_ACCESS_KEY: "{{ restic_s3_secret }}"
+      RESTIC_BACKUP_ARGS: >-
+        --tag grocy
+      RESTIC_BACKUP_SOURCES: "/backup"
+    volumes:
+      - "{{ stack_grocy_env_dir }}:/backup/{{ stack_grocy_env_dir }}"
+{% endif %}
+
 networks:
   caddy:
     external: true
-
-volumes:
-  caddy_data: {}