Move Init Containers topic. (#2866)

_data/concepts.yml

@@ -18,7 +18,6 @@ toc:
   section:
   - title: Pods
     section:
-    - docs/concepts/abstractions/init-containers.md
   - title: Controllers
     section:
     - docs/concepts/abstractions/controllers/statefulsets.md
@@ -31,6 +30,7 @@ toc:
     section:
     - docs/concepts/workloads/pods/pod-overview.md
     - docs/concepts/workloads/pods/pod-lifecycle.md
+    - docs/concepts/workloads/pods/init-containers.md
   - title: Jobs
     section:
     - docs/concepts/jobs/run-to-completion-finite-workloads.md

docs/concepts/workloads/pods/init-containers.md

@@ -2,6 +2,9 @@
 assignees:
 - erictune
 title: Init Containers
+redirect_from:
+- "/docs/concepts/abstractions/init-containers/"
+- "/docs/concepts/abstractions/init-containers.html"
 ---
 
 {% capture overview %}