React-dom required when using `pages`

[trotzig]

From a slack channel:

Question about the full-page screenshots. We are trying to use this in another repository, and Happo is failing with:

Cannot find module 'react-dom'

I'd think that with pages present it wouldn't care about type 🤷

[trotzig]

Closing, this was a red herring. The error was because the wrong config file was used.