Expand app container explanation

kubernetes · Feb 18, 2019 · 150805e · 150805e
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diff --git a/content/en/docs/reference/glossary/app-container.md b/content/en/docs/reference/glossary/app-container.md
@@ -14,4 +14,7 @@ tags:
 
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+An init container lets you separate initialization details that are important for the overall 
+{{< glossary_tooltip text="workload" term_id="workload" >}}, and that don't need to keep running
+once the pod has started.
 If a pod doesn't have any init containers configured, all the containers in that pod are app containers.