fix(postgres): Fix wrong network policy defintion

This patch puts the port definitions into the right place and uses the
key `port` instead of `containerPort` as expected by NetworkPolicy
objects.

infrastructure/postgres/user-namespace-network-policy.yaml

@@ -20,11 +20,6 @@ spec:
             - namespaceSelector:
                 matchLabels:
                   name: zalando-postgres
-          podSelector:
-            matchLabels:
-              application: spilo
-          policyTypes:
-          - Ingress
             ports:
             - containerPort: 8008
               protocol: TCP
@@ -32,3 +27,8 @@ spec:
               protocol: TCP
             - containerPort: 8080
               protocol: TCP
+          podSelector:
+            matchLabels:
+              application: spilo
+          policyTypes:
+          - Ingress