kubernetes: added nginx ingress config

Signed-off-by: Pranam Lashkari <lpranam@collabora.com>
Change-Id: I0ffcc8dca1cff7dc4c6eaec115d2030a250aca33

kubernetes/helm/collabora-online/templates/ingress.yaml

@@ -3,6 +3,8 @@ kind: Ingress
 metadata:
   name: {{ .Values.global.ingress.name }}
   namespace: {{ .Values.namespace.collabora }}
+  annotations:
+    nginx.ingress.kubernetes.io/upstream-hash-by: "$arg_WOPISrc"
 spec:
   rules:
   - host: {{ .Values.hosts.host }}