Basic Kubernetes configuration up and running

Add postgres operator and cluster
Create gitlab database declaratively
Update flake
YES, YES, I KNOW THE PASSWORDS ARE DUMB AND WORLD READABLE

manifests/postgres/kustomization.yaml

@@ -0,0 +1,13 @@
+namespace: db
+
+helmCharts:
+  # Install the operator first (with CRDs)
+  - name: cloudnative-pg
+    repo: "https://cloudnative-pg.github.io/charts/"
+    version: "0.23.2"
+    namespace: cnpg-system
+    releaseName: cnpg
+    includeCRDs: true
+    valuesInline:
+      crds:
+        create: true