Comment by simonw

Heroku and Vercel and Render all have features that can do this. You can wire up your own for other hosting providers using a lot of scripting on top of GitHub Actions.

Heroku: https://devcenter.heroku.com/articles/github-integration-rev...

Vercel: https://vercel.com/docs/deployments/environments#preview-env...

Render: https://render.com/docs/service-previews