npm i --save-dev create-react-app

npx create-react-app voronoi3d

npm init react-app voronoi3d

You are running Node v11.15.0.
Create React App requires Node ^10.12.0 || >=12.0.0 or higher. 
Please update your version of Node.

Success! Created voronoi3d at /home/ika/public_html/voronoi-react-three-fiber/voronoi3d
Inside that directory, you can run several commands:

  npm start
    Starts the development server.

  npm run build
    Bundles the app into static files for production.

  npm test
    Starts the test runner.

  npm run eject
    Removes this tool and copies build dependencies, configuration files
    and scripts into the app directory. If you do this, you can’t go back!

We suggest that you begin by typing:

  cd voronoi3d
  npm start

Happy hacking!