Added readme

Author: stevespringett

README.md

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+# CycloneDX Website Repository (Archived)
+
+This repository previously contained the source code for the [CycloneDX](https://cyclonedx.org) website. It is now **archived** and no longer actively maintained. Pull requests and issues are not being accepted in this repository.
+
+## Tool Center Submissions
+
+If you are looking to contribute to the CycloneDX Tool Center (the largest collection of SBOM/xBOM products, projects, and services), please make your submissions at the [CycloneDX Tool Center repository](https://github.com/CycloneDX/tool-center).
+
+## Further Information
+
+- For general information, documentation, and community resources, visit the [CycloneDX website](https://cyclonedx.org).
+- If you have questions or need support, consider joining the [CycloneDX Slack community](https://cyclonedx.org/slack).