Upgrade PostgreSQL from 10 to 12

installer/roles/kubernetes/templates/postgresql-persistent.yml.j2

@@ -99,7 +99,7 @@ objects:
                 name: ${DATABASE_SERVICE_NAME}
           - name: POSTGRESQL_MAX_CONNECTIONS
             value: ${POSTGRESQL_MAX_CONNECTIONS}
-          image: registry.redhat.io/rhel8/postgresql-10
+          image: registry.redhat.io/rhel8/postgresql-12
           imagePullPolicy: IfNotPresent
           livenessProbe:
             exec:

installer/roles/kubernetes/templates/postgresql-values.yml.j2

@@ -36,11 +36,14 @@ master:
 {% endif %}
 image:
 {% if pg_image_registry is defined %}
+# The default bitnami image from the chart doesn't work on ARM
   registry: {{ pg_image_registry }}
 {% endif %}
-  # The default bitnami image from the chart doesn't work on ARM
-  repository: postgres
-  tag: '11'
+{% if pg_image_registry is not defined %}
+  registry: docker.io/bitnami
+{% endif %}
+  repository: postgresql
+  tag: '12.5.0'
 volumePermissions:
   image:
 {% if pg_image_registry is defined %}