RHIDP-3111 Replace references to deprecated backend.auth.keys config (#614)

* RHIDP-3111 Replace references to deprecated backend.auth.keys config in product docs

Signed-off-by: Fabrice Flore-Thébault <[email protected]>

* Apply suggestions from code review

Co-authored-by: Kashish Mittal <[email protected]>

* Update modules/installation/proc-add-custom-app-config-file-ocp-operator.adoc

---------

Signed-off-by: Fabrice Flore-Thébault <[email protected]>
Co-authored-by: Kashish Mittal <[email protected]>

Author: themr0c

modules/installation/proc-add-custom-app-config-file-ocp-operator.adoc

@@ -34,8 +34,11 @@ data:
       baseUrl: <{product-very-short}_URL> # <1>
     backend:
       auth:
-        keys:
-          - secret: "${BACKEND_SECRET}" # <2>
+        externalAccess:
+            - type: legacy
+              options:
+                subject: legacy-default-config
+                secret: "${BACKEND_SECRET}" # <2>
       baseUrl: <{product-very-short}_URL> # <3>
       cors:
         origin: <{product-very-short}_URL> # <4>

modules/installation/proc-deploy-rhdh-instance-eks.adoc

@@ -33,8 +33,11 @@ data:
       baseUrl: https://<rhdh_dns_name>
     backend:
       auth:
-        keys:
-          - secret: "${BACKEND_SECRET}"
+        externalAccess:
+            - type: legacy
+              options:
+                subject: legacy-default-config
+                secret: "${BACKEND_SECRET}"
       baseUrl: https://<rhdh_dns_name>
       cors:
         origin: https://<rhdh_dns_name>

modules/installation/proc-rhdh-deploy-aks-operator.adoc

@@ -103,8 +103,11 @@ data:
       baseUrl: https://<app_address>
     backend:
       auth:
-        keys:
-          - secret: "${BACKEND_SECRET}"
+        externalAccess:
+            - type: legacy
+              options:
+                subject: legacy-default-config
+                secret: "${BACKEND_SECRET}"
       baseUrl: https://<app_address>
       cors:
         origin: https://<app_address>