Fix prod docs build

[devongovett]

A CSS dependency was causing the build to fail. Now we just ignore them inside the SSG packager (we only need to run JS there).

[rspbot]

Build successful! 🎉

• View the storybook
• View the storybook-17
• View the storybook-16
• View the documentation

[rspbot]

## API Changes

unknown top level export { type: 'any' }
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unknown type { type: 'link' }
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unknown top level export { type: 'any' }
unknown top level export { type: 'any' }
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