Getting started with PullPreview
Option 1 - Automated setup
Note: the GitHub installation flow will say that the app may "Act on your behalf", which is a standard message even though the app doesn't actually request permissions to act on your behalf. There is a long-standing discussion about this issue here.
Option 2 - Manually setup your workflow file
Save (and adjust to your liking) the following workflow file into .github/workflows/pullpreview.yml in your repository, add your AWS credentials, and you're good to go: