We have dev/staging/prod api environments each of which has a corresponding web/app frontend. With the app, we can run a prebuild to get the different variants, but when targeting web, there isn't a good equivalent.

Ideally, we'd be able to configure three different custom domains and have build tooling to deploy a build per environment to the matching custom domains. Atm we're limited by having just one custom domain for EAS deploy.

Alternatively, we'd be able to use the same codebase to target three different expo projects (per environment) each with a custom domain setup. This isn't currently possible (i think) because with cli I can't target multiple expo projects. Would be good to be able to configure in eas.json.