Switch from host network to hostPort bindings

docs/kubernetes/mailu/front.yaml

@@ -27,7 +27,6 @@ spec:
             - matchExpressions:
               - key: node-role.kubernetes.io/node
                 operator: Exists
-      hostNetwork: true
       nodeSelector:
         node-role.kubernetes.io/node: ""
       dnsPolicy: ClusterFirstWithHostNet
@@ -46,31 +45,39 @@ spec:
         ports:
           - name: pop3
             containerPort: 110
+            hostPort: 110
             protocol: TCP
           - name: pop3s
             containerPort: 995
+            hostPort: 995
             protocol: TCP
           - name: imap
             containerPort: 143
+            hostPort: 143
             protocol: TCP
           - name: imaps
             containerPort: 993
+            hostPort: 993
             protocol: TCP
           - name: smtp
             containerPort: 25
+            hostPort: 25
             protocol: TCP
+          - name: smtps
+            containerPort: 465
+            hostPort: 465
+            protocol: TCP
+          - name: smtpd
+            containerPort: 587
+            hostPort: 587
+            protocol: TCP
+          # internal services (not exposed externally)
           - name: smtp-auth
             containerPort: 10025
             protocol: TCP
           - name: imap-auth
             containerPort: 10143
             protocol: TCP
-          - name: smtps
-            containerPort: 465
-            protocol: TCP
-          - name: smtpd
-            containerPort: 587
-            protocol: TCP
           - name: auth
             containerPort: 8000
             protocol: TCP