chore/release: deprecation notice

README.md

@@ -1,5 +1,8 @@
 # Deploy Sourcegraph on Kubernetes with Kustomize
 
+> **⚠️ Deprecation Notice**
+> This Kustomize-based deployment method is planned for deprecation. We recommend using [Helm](https://sourcegraph.com/docs/admin/deploy/kubernetes) for Kubernetes deployments.
+
 [![sourcegraph: search](https://img.shields.io/badge/sourcegraph-search-brightgreen.svg)](https://sourcegraph.com/github.com/sourcegraph/deploy-sourcegraph-k8s) [![master build status](https://badge.buildkite.com/018ed23ed79d7297e7dd109b745597c58d875323fb06e81786.svg?branch=main)](https://buildkite.com/sourcegraph/deploy-sourcegraph-k8s)
 
 > **Note**

instances/README.md

@@ -1,5 +1,8 @@
 # Instances
 
+> **⚠️ Deprecation Notice**
+> This Kustomize-based deployment method is planned for deprecation. We recommend using [Helm](https://sourcegraph.com/docs/admin/deploy/kubernetes) for Kubernetes deployments.
+
 See the [Sourcegraph Kustomize docs](https://docs.sourcegraph.com/admin/deploy/kubernetes/kustomize) for the latested instructions.
 
 ## Create an overlay for your instances

instances/template/kustomization.template.yaml

@@ -1,4 +1,9 @@
 ##########################################################################################
+# ⚠️  DEPRECATION NOTICE
+# This Kustomize-based deployment method is planned for deprecation.
+# We recommend using Helm for Kubernetes deployments.
+# See: https://sourcegraph.com/docs/admin/deploy/kubernetes
+##########################################################################################
 # DEPLOY INSTRUCTIONS
 #
 # Build Manifests: kubectl kustomize instances/$CURRENT_DIR -o cluster.yaml