here i try to create a tic-tok-toe application using react

npm and npx should be installed
to initiate react app
using the command
npx create-react-app {app-name}
which creates a folder with folder name {app-name}
by making changes in App.js file you can build the app

how i deployed this app

run this command
npm install gh-pages --save-dev

about gh-pages

gh-pages is npm package
The package automates the deployment process by taking the files (typically in the build folder) and pushing them to the gh-pages branch, making it available for GitHub Pages hosting.
gh-pages is the branch of github repository

update the package.json file

add "homepage": "https://username.github.io/repositoryname",

in scripts add this "deploy": "gh-pages -d build"

then push this code by the command
git add .
git commit -m "Initial commit"
git remote add origin https://github.com/your-username/your-repo-name.git
git push -u origin main
then run the command
npm run build
npm run deploy
if you not added the deploy script in scripts run
gh-pages -d build