Add note about Helm to container reg docs

doc/user/packages/container_registry/index.md

@@ -596,6 +596,15 @@ Here are examples of regex patterns you may want to use:
   (?:v.+|master|release)
   ```
 
+## Use the Container Registry to store Helm Charts
+
+With the launch of [Helm v3](https://helm.sh/docs/topics/registries/),
+you can use the Container Registry to store Helm Charts. However, due to the way metadata is passed
+and stored by Docker, it is not possible for GitLab to parse this data and meet performance standards.
+[This epic](https://gitlab.com/groups/gitlab-org/-/epics/2313) updates the architecture of the Container Registry to support Helm Charts.
+
+You can read more about the above challenges [here](https://gitlab.com/gitlab-org/gitlab/-/issues/38047#note_298842890).
+
 ## Limitations
 
 - Moving or renaming existing Container Registry repositories is not supported