rustdesk: Initial deployment

Rust Desk is a remote assistance software solution.  The open source
edition is sufficient for what I want to do with it, namely: help Mom
and Dad troubleshoot issues on their PCs.  Mom is currently having
trouble with the Nextcloud sync client, so I need to be able to help her
with that.

rustdesk/network-policy.yaml

@@ -0,0 +1,30 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: rustdesk
+  labels:
+    app.kubernetes.io/name: rustdesk
+    app.kubernetes.io/component: rustdesk
+spec:
+  egress:
+  - to:
+    - podSelector:
+        matchLabels:
+          app.kubernetes.io/part-of: rustdesk
+  - to:
+    - namespaceSelector:
+        matchLabels:
+          kubernetes.io/metadata.name: kube-system
+      podSelector:
+        matchLabels:
+          k8s-app: kube-dns
+    ports:
+    - port: 53
+      protocol: UDP
+    - port: 53
+      protocol: TCP
+  podSelector:
+    matchLabels:
+      app.kubernetes.io/component: rustdesk
+  policyTypes:
+  - Egress