Configure 404 error page

[matiasponce]

Hi, I'm using this package and the create-react-app with react-scripts-ts and I can't get a good configuration of the error page.
I followed all the steps and I always get the Github's 404 page

[gabrielsimoes]

The problem is not related to gh-pages. Suppose you are deploying your dist/ folder with gh-pages. Then you have to somehow place a 404.html or 404.md file in this dist/ folder before deploying.