content: Add repo to pulumi article tldr

Author: sebst

src/content/posts/20250213-pulumi.md

@@ -16,6 +16,8 @@ In this article, we use [Pulumi](https://bas.surf/pulumi) to spin up a cloud-bas
 
 This setup runs on [Hetzner Cloud](https://bas.surf/hetzner), starts in under 5 minutes, and costs less than one-sixth the price of GitHub Codespaces.
 
+The full source of the project is in a GitHub [Repository](https://bas.surf/pulumi-selfhosted-codespace).
+
 ## Introduction
 
 Containers are a fantastic way to package and run your applications—and standardize them. Similarly, devcontainers provide a consistent environment for development across teams. GitHub Codespaces leverages the [VSCode devcontainer specification](https://bas.surf/devcontainer-spec) to offer a ready-to-use cloud development environment.