Required

Node.js 18.0.0+

Prepare

1. add to /etc/hosts:

127.0.0.1    first.localhost
127.0.0.1    second.localhost
127.0.0.1    third.localhost

npm i

nextjs ssr:

npm run nextjs-app

react:

npm run react-app

Gatsby:

npm run gatsby

4. open in browser:

http://first.localhost:3000/
http://second.localhost:3000/
http://third.localhost:3000/