Added a sentence to explain that the `next.config.js` file would need to be created if you don't have it yet (it does not seem to get created by default), and added a link to the docs about that.
Edited the paragraph which explains the need for setting assetPrefix. It had a few incorrect grammar & spelling issues (e.g., "than" instead of "then", etc.). I also added a link to GitHub's description of Project vs User Page. Restructured the sentences a little for easier readability.