Maciej Ramotowski authored Mar 02, 2021 and Martin Roukala committed Mar 08, 2021

This is the first step to reduce our custom code, as Helmfiles make it
easy to re-use other helm charts, a bit like docker-compose.

This commit drops the custom redis and postgresql deployments, and
instead uses bitnami's charts.

v2: Martin Peres
 - squashed a lot of commits into this one
 - add a commit message