[BUG] @shopify/hydrogen doesn't appear to be written in CJS

[arlyxiao]

Describe the bug

1. css-modules example doesn't work.
2. display the errors in console.

@shopify/hydrogen doesn't appear to be written in CJS, but also doesn't appear to be a valid ES module (i.e. it doesn't have "type": "module" or an .mjs extension for the entry point). Please contact the package author to fix.

To Reproduce

1. Go to 'examples/css-modules'
2. Run yarn install && yarn dev
3. Go to 'http://localhost:3000'. The page can't be shown.
4. See error in console: '@shopify/hydrogen doesn't appear to be written in CJS, but also doesn't appear to be a valid ES module (i.e. it doesn't have "type": "module" or an .mjs extension for the entry point). Please contact the package author to fix.'

Expected behaviour

1. It shouldn't show the error in console.
2. Page should be shown correctly.

• Hydrogen version: latest
• Node version: v16.13.2
• Device details

[jplhomer]

Duplicate of Shopify/hydrogen#341