Add traefik middleware support (#601)

* add basic middleware chain to traefik

* Try some idea's for common ingress middleware support

* create middleware namespace as pre-install hook

* rename namespace file

* Add additional list with middlewares and tune the output a bit

* Add basic auth middleware spawner

* add forwardAuth support

* polish middleware names and add config examples

* initial go at traefik middleware GUI elements

* fix labels

* more missing labels

charts/stable/traefik/values.yaml

@@ -404,3 +404,23 @@ securityContext:
 
 podSecurityContext:
   fsGroup: 65532
+
+## SCALE Middleware Handlers
+
+middlewares:
+  basicAuth: []
+  # - name: basicauthexample
+  #   users:
+  #     - username: testuser
+  #       password: testpassword
+  forwardAuth: []
+  # - name: forwardAuthexample
+  #   address: https://auth.example.com/
+  #   authResponseHeaders:
+  #     - X-Secret
+  #     - X-Auth-User
+  #   authRequestHeaders:
+  #     - "Accept"
+  #     - "X-CustomHeader"
+  #   authResponseHeadersRegex: "^X-"
+  #   trustForwardHeader: true