chore(kong): set postgres default image repository, name and tag to '' (#1400)

Author: pmalek

charts/kong/CHANGELOG.md

@@ -1,7 +1,19 @@
 # Changelog
 
+## 3.0.0
+
+### Changes
+
+* Default Postgres repository, image name and tag are set to `""`.
+  This requires users that use the db backed installations to specify these.
+  The default Bitnami Postgres image is not available anymore, for more details
+  please see: <https://github.com/bitnami/containers/issues/83267>.
+  [#1373](https://github.com/Kong/charts/pull/1373)
+
 ## 2.52.0
 
+### Changes
+
 * Added `migrations.waitContainer.securityContext` to allow setting a security context on the migrations wait-for-postgres init container.
 * Added `certificates.manager` configuration to enable separate cert-manager certificate generation for Kong Manager (admin GUI).
   This allows Kong Manager to use a dedicated certificate instead of sharing the admin API certificate,

charts/kong/Chart.yaml

@@ -8,7 +8,7 @@ maintainers:
 name: kong
 sources:
   - https://github.com/Kong/charts/tree/main/charts/kong
-version: 2.52.0
+version: 3.0.0
 appVersion: "3.9"
 dependencies:
   - name: postgresql

charts/kong/README.md

@@ -178,6 +178,10 @@ after updating externally supplied ConfigMap content.
 
 #### Using the Postgres sub-chart
 
+> **NOTE**: Due to Bitnami images not being maintained anymore, starting with
+> Kong chart 3.0 users have to specify the Postgres image themselves via
+> `postgresql.image.registry`, `postgresql.image.repository` and `postgresql.image.tag`.
+
 The chart can optionally spawn a Postgres instance using [Bitnami's Postgres
 chart](https://github.com/bitnami/charts/blob/master/bitnami/postgresql/README.md)
 as a sub-chart. Set `postgresql.enabled=true` to enable the sub-chart. Enabling
@@ -187,6 +191,8 @@ The Postgres sub-chart is best used to quickly provision temporary environments
 without installing and configuring your database separately. For longer-lived
 environments, we recommend you manage your database outside the Kong Helm
 release.
+You can find a guide for using Cloud Native PostgreSQL with Kong
+[on our documentation site](https://developer.konghq.com/gateway/install/kubernetes/on-prem/).
 
 ##### Postgres sub-chart considerations for OpenShift