update ingress-nginx to expose port 5432 for postgresql

kubernetes/apps/postgresql/scripts/ingress-nginx-svc-controller-patch.yaml

@@ -0,0 +1,6 @@
+spec:
+  ports:
+    - name: postgresql-tcp
+      port: 5432
+      targetPort: 5432
+      protocol: TCP

kubernetes/apps/postgresql/scripts/patch-ingress-nginx.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+kubectl patch service ingress-nginx-controller -n ingress-nginx --patch "$(cat ingress-nginx-svc-controller-patch.yaml)"