Replace button with link and add GitHub reference after intro text

Author: andrebassi

docs/docusaurus/docs/introduction.md

@@ -11,6 +11,8 @@ hide_title: true
 
 Runner Codes is a **secure execution environment** for running code snippets generated by Large Language Models (LLMs) inside [Firecracker microVMs](https://firecracker-microvm.github.io/). It provides strong isolation, fast boot times, and support for multiple programming languages.
 
+**Open Source:** https://github.com/andrebassi/runner-codes
+
 ## Why Firecracker?
 
 Firecracker is a Virtual Machine Monitor (VMM) developed by AWS that provides:
@@ -68,7 +70,7 @@ curl -X POST http://localhost:8080/api/v1/execute \
 
 Runner Codes is **fully open source** under the MIT license. The entire codebase, including the CLI, HTTP API, guest runner, and documentation, is available on GitHub. We welcome contributions, bug reports, and feature requests from the community.
 
-<a href="https://github.com/andrebassi/runner-codes" target="_blank" class="button button--primary button--lg">View on GitHub</a>
+**GitHub:** https://github.com/andrebassi/runner-codes
 
 ## Next Steps