Update README.md

README.md

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 [![The Apache 2.0 license badge](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 [![Follow us on Twitter](https://img.shields.io/static/v1?label=Twitter&message=Follow&color=1DA1F2)](https://twitter.com/kadrasIO)
 
+> **Warning**
+> This package has been archived. If you need a build service, you can choose GitHub Actions, supported by Kadras, or bring your own build service package.
+
 A Carvel package for [kpack](https://github.com/buildpacks-community/kpack), a Kubernetes-native implementation of Cloud Native Buildpacks to build OCI images from within the cluster.
 
 ## 🚀  Getting Started