Docs - Enable the dependency proxy with Charts

doc/administration/packages/dependency_proxy.md

@@ -32,6 +32,23 @@ To enable the dependency proxy feature:
 1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure "How to reconfigure Omnibus GitLab") for the changes to take effect.
 1. Enable the [Puma web server](https://docs.gitlab.com/omnibus/settings/puma.html).
 
+**Helm chart installations**
+
+1. After the installation is complete, update the global `appConfig` to enable the feature:
+
+   ```yaml
+   global:
+     appConfig:
+       dependencyProxy:
+         enabled: true
+         bucket: gitlab-dependency-proxy
+         connection: {}
+          secret:
+          key:
+   ```
+
+For more information, see [Configure Charts using Globals](https://docs.gitlab.com/charts/charts/globals.html#configure-appconfig-settings).
+
 **Installations from source**
 
 1. After the installation is complete, configure the `dependency_proxy`