Add JS wrapper to CSS to support Serverless target #297
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Resolves #281
Using the 'Serverless' target on in Next.js on some platforms does not work if you try to read in files at runtime that are not JavaScript or JSON (e.g. CSS files), as discussed in #281
To work around this issue, this script is a manual step that wraps the compiled CSS (e.g. used for sign in / error pages) that is output by PostCSS by n a JavaScript file that has the CSS embedded in it, and exports a function that returns that CSS as a string.
This way the CSS is included in a .js file and won't cause problems with the Serverless target.