Apply templates to all concepts and tasks to fix double bullets in TOC (#9149)

* Apply concept template to fix double bullet issue.

* Apply concept template

* Apply templates to tasks

content/en/docs/tasks/configure-pod-container/configure-service-account.md

@@ -4,9 +4,11 @@ reviewers:
 - liggitt
 - thockin
 title: Configure Service Accounts for Pods
+content_template: templates/task
 weight: 90
 ---
 
+{{% capture overview %}}
 A service account provides an identity for processes that run in a Pod.
 
 *This is a user introduction to Service Accounts.  See also the
@@ -26,6 +28,18 @@ cluster).  Processes in containers inside pods can also contact the apiserver.
 When they do, they are authenticated as a particular Service Account (for example,
 `default`).
 
+{{% /capture %}}
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+{{< toc >}}
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+{{% capture prerequisites %}}
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+{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
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 ## Use the Default Service Account to access the API server.
 
 When you create a pod, if you do not specify a service account, it is
@@ -233,3 +247,5 @@ spec:
 
 TODO: Test and explain how to use additional non-K8s secrets with an existing service account.
 -->
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+{{% /capture %}}