PostgreSQL storage size values have changed

[sneumann]

Hi,
9939a53 moved from the postgres 8.x chart to 11.x,
along the way the specification of the storage volume has changed, the following no longer works, instead a default pvc with 8Gi is created:

postgresql:
  fullnameOverride: "metfrag-postgresql"
  persistence:
    enabled: yes
    size: "80Gi"

So with existing values.yaml an older release needs to be deployed:
helm install metfrag --values metfrag-stable.yaml --version 0.1.10 -n metfrag ipb-public/metfrag