npm run build --api-key=REPLACE_ME not passing api_key into build

Issue summary

Running the yarn build command works, the npm run build command does not inject the api key as expected

Using yarn:
yarn build --api-key=REPLACE_ME

Using npm:
npm run build --api-key=REPLACE_ME

Expected behavior

What do you think should happen?
The npm run build command should inject the api key into the build

Actual behavior

What actually happens?
The build script reports

frontend         | Building the frontend app without an API key. The frontend build will not run without an API key. Set the SHOPIFY_API_KEY environment variable when running the build command.

Tip: include an error message (in a <details></details> tag) if your issue is related to an error

Steps to reproduce the problem

1. npm run build --api-key=REPLACE_ME
2. Where REPLACE_ME is the API Key

Reduced test case

The best way to get your bug fixed is to provide a reduced test case.

Checklist

• I have described this issue in a way that is actionable (if possible)

Reproduce the discrepancy with yarn build --api-key=REPLACE_ME and npm run build --api-key=REPLACE_ME, then inspect the build configuration used by each command. Done means the npm command passes the API key into the frontend build and no longer reports that the key is missing.