Alright, let's break it down into simpler terms for you.

This article is like a story. The story talks about a way to make sure a computer knows how to find the right place to get information when it's being built. Think of it like building a LEGO set and knowing where to find each piece.

Here’s what happens in the story:
1. The author is learning to build things on a computer.
2. She needs her project to know where to look for information when she's working on it vs. when it's already built and ready for others to see (like showing a friend your completed LEGO set).
3. She found a smart trick using something called "NODE_ENV" that helps the project know if it's still being built or if it's already finished.

It's like telling your LEGO set to get pieces from your room while you're building, but later, it should show on the shelf where everyone can see it.

She also shows us some special "instructions" (called code) that makes this happen. So whenever someone makes this project, it will know exactly where to find what it needs, whether it’s still being put together or all done!

Isn't that cool?