====== docker upgrade 12 to 13 ======

Stop all services.

Add new service with PGSQL v13

<file yaml docker-compose.yml>
services:
  db:
    container_name: db
    image: postgres:12-alpine

  db13:
    container_name: db13
    image: postgres:13-alpine
</file>

Start only DB services:

<code bash>
docker compose up db db13 -d
</code>

Make SQL dump and restore it in new DB:

<code bash>
docker exec -it db pg_dumpall -U nextcloud > upgrade_backup_12.sql

cat upgrade_backup_12.sql | docker exec -i db13 psql -U nextcloud
</code>

Change services to use new db.