Update in step-1.mdx

[cassiasamp]

Closes #

Just adding some detail to instructions about creating an empty app.scss file.
The parts in the tutorial about recompiling starting on line 182 are still unclear to me as their meaning.
So, I hope the creation of this empty file is the right way to go and it seems a good idea to make it explicit.

Changelog

New

• Included "(...) a separate file. Create an empty file app.scss in the 'src' directory, and then import it in (...)"

Changed

• The line "speed this up by moving our custom app Sass into a separate file, app.scss in
  the 'src' directory, and import that from App.js."

Removed

• Some words and punctuation.

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[cassiasamp]

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[cassiasamp]

recheck

[guidari]

Hey @cassiasamp thank you for your contribution!

We are actually doing a new tutorial using NextJS in this PR which means the current tutorial will be sunset soon.

[cassiasamp]

Thanks @guidari, that's an interesting info...would you say it's best if I switch from React to Next.js?
I'm guessing the new tutorial would make things simpler 😅

[alisonjoseph]

Closing this as the tutorial will be updated in #3710 .