Magento – Can anyone share the demo link of Magento 2.3.0 PWA Studio

You are on the right track but you can easily view Documentation when you click on Docs on the right top corner.

See screenshot with an example for the Category Query and the Documentation in the right sidebar.

1. git clone https://github.com/magento-research/pwa-studio.git
2. cd pwa-studio
3. npm install
4. cp packages/venia-concept/.env.dist packages/venia-concept/.env
5. edit and change MAGENTO_BACKEND_URL in packages/venia-concept/.env
6. In pwa-studio folder run: npm run build && NODE_ENV=production PORT=8000 npm run stage:venia

It will start the server on port 8000.

I used PM2 to manage node services.

(cd packages/venia-concept/ && NODE_ENV=production PORT=8000 node server.js)

Then I made Nginx proxy to pass connection from 8000 to 80 and 443

Hope it helps.