fix: add nginx sidecar for Bitwarden well-known endpoint

This fixes iOS app connection issues by properly responding to
/.well-known/bitwarden/ endpoint which iOS clients use to identify
the server.

apps/vaultwarden/manifests/vaultwarden-service.yaml

@@ -11,5 +11,5 @@ spec:
     - protocol: TCP
       name: http
       port: 80
-      targetPort: 80
+      targetPort: 8080
   type: ClusterIP