Deployment NG: handle borg backup

Credentials should be configured as variables in GitLab and then we deploy a borg container for each project which will be setup for regular backups automatically.

added To Do label

added Doing label and removed To Do label

assigned to @jurgenhaas

Using docker image from https://hub.docker.com/r/b3vis/borgmatic and https://github.com/borgmatic-collective/docker-borgmatic

mentioned in commit c4bde9c7

mentioned in commit ac08dfd3

mentioned in commit composer/plugin/docker4drupal@3f24f491

mentioned in commit 04e6835e

mentioned in commit composer/plugin/docker4drupal@85736605

closed

removed Doing label