'Unknown option' error when trying to use the container to build with an artifact.

If I run the following command, everything works fine and the app runs in the container:
`podman run --rm -v $(pwd):/w -w /w claudiombsilva/claude-artifact-runner sample.jsx`

But if I run the following to try and build the app into an HTML file, I get an error:
```
podman run --rm -v $(pwd):/w -w /w claudiombsilva/claude-artifact-runner build sample.jsx
❌ Unknown option: sample.jsx
```