Fix values don't meet the specifications

Author: rgaiacs

config/gesis-stage.yaml

@@ -57,6 +57,7 @@ binderhub:
       - notebooks-test.gesis.org
   jupyterhub:
     hub:
+      baseUrl: /jupyterhub
       db:
         pvc:
           storageClassName: local-storage
@@ -68,7 +69,6 @@ binderhub:
     ingress:
       hosts:
         - notebooks-test.gesis.org
-      path: /jupyterhub
   replicas: 1
 cryptnono:
   enabled: true