1. Clone or fork project.
2. Install required dependencies with npm install.
3. Remove homepage entirely from package.json or set it to single dot.

// package.json
{
  "name": "react-frontend-dev-portfolio",
  "homepage": "https://dorota1997.github.io/react-frontend-dev-portfolio/",   <-- remove/edit this
  "version": "0.1.0",
  "private": true,
  "dependencies": {
  ...
}

4. npm start project and customize it.
5. Deploy on github-pages using npm run deploy command.