feat(k8s/external): add Home Assistant external routing via Traefik

kubernetes/app/external/homeassistant/middleware.yaml

@@ -0,0 +1,19 @@
+---
+apiVersion: traefik.io/v1alpha1
+kind: Middleware
+metadata:
+  name: security-headers
+  namespace: homeassistant
+spec:
+  headers:
+    sslRedirect: true
+    stsIncludeSubdomains: true
+    stsPreload: true
+    stsSeconds: 315360000
+    browserXssFilter: true
+    contentTypeNosniff: true
+    forceSTSHeader: true
+    frameDeny: true
+    customFrameOptionsValue: SAMEORIGIN
+    hostsProxyHeaders:
+      - "X-Forwarded-Host"