🔧(helm) adapt helm nginx

We adapt the nginx configuration to works
with http requests and on the collaboration routes.
Requests are light but quite network intensive,
so we add a cache system above "collaboration-auth".
It means the backend will be called only once
every 30 seconds after a 200 response.

src/helm/impress/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v2
 type: application
 name: docs
-version: 2.2.0-beta.1
+version: 2.2.0-beta.2
 appVersion: latest

src/helm/impress/values.yaml

@@ -82,7 +82,11 @@ ingressCollaborationWS:
   ## @param ingressCollaborationWS.annotations.nginx.ingress.kubernetes.io/proxy-send-timeout
   ## @param ingressCollaborationWS.annotations.nginx.ingress.kubernetes.io/upstream-hash-by
   annotations:
+    nginx.ingress.kubernetes.io/auth-cache-key: "$http_authorization"
+    nginx.ingress.kubernetes.io/auth-cache-duration: 200 30s
     nginx.ingress.kubernetes.io/auth-response-headers: "Authorization, X-Can-Edit, X-User-Id"
+    nginx.ingress.kubernetes.io/auth-snippet: |
+      proxy_set_header Accept "application/json";
     nginx.ingress.kubernetes.io/auth-url: https://impress.example.com/api/v1.0/documents/collaboration-auth/
     nginx.ingress.kubernetes.io/enable-websocket: "true"
     nginx.ingress.kubernetes.io/proxy-read-timeout: "86400"