Earthly is deprecated

<img width="534" height="116" alt="Image" src="https://github.com/user-attachments/assets/decb3b62-0c36-429d-87c7-ff61f160191f" />

https://earthly.dev/blog/shutting-down-earthfiles-cloud/

Find an alternative containerized build, or roll our own in a `Dockerfile`.