Add restic cache

roles/backups/tasks/main.yml

@@ -5,6 +5,10 @@
     dest: /root/.pgpass
     mode: "0600"
     owner: root
+- name: Create restic cache volume
+  become: true
+  community.docker.docker_volume:
+    name: restic-cache
 - name: Run backup container
   become: true
   community.docker.docker_container:
@@ -22,6 +26,7 @@
     entrypoint: ["sleep"]
     command: ["infinity"]
     volumes:
+      - restic-cache:/root/.cache/restic
       - /root/.pgpass:/root/.pgpass:ro
       - /mnt/hdd/archivebox-data:/data/archivebox:ro
       - archivebox:/data/docker/archivebox:ro