Added Bitnami PostgreSQL sub chart

mailman3/Chart.yaml

@@ -15,9 +15,20 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.0.2
+version: 1.0.4
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 appVersion: 0.3.10
+
+maintainers:
+  - name: Eric O'Neill Meehan
+    email: eric@eom.dev
+
+dependencies:
+  # https://github.com/bitnami/charts/blob/main/bitnami/postgresql
+  - name: postgresql
+    repository: oci://registry-1.docker.io/bitnamicharts
+    version: 16.7.27
+    condition: postgresql.enabled