I completed this project for selection to the Headway :)
Before you start application on your localhost, please, remove from package.json this line: "homepage": "https://arthurseredaa.github.io/headway-test-task"
In the project directory, you can run:
Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.
If you change code base, you need to run predeploy command, that allow you to see your changes in deployed app on github-pages.
After you make predeploy, you need to completely deploy app on github-pages, so run this command.