My app failed to build and I received an exit code

A failed build with an exit code of 1 or greater indicates that a user process has failed.

To diagnose which process failed during build, review your app’s build logs in the control panel by clicking the Activity tab and then clicking the deployment link of the failed build. You can then see the app’s build logs under the Build logs window.

Dedicated egress IPs route egress (outbound) traffic from an app. To route ingress (inbound) traffic to an app, use one of App Platform’s public ingress IPs.
Add the root domain to the list of domains in the app’s settings along with the wildcard subdomain.
App Platform apps may be slow or unable to resolve .gov domains because the domain administrators have blocked DigitalOcean’s IP addresses. To fix this, you can contact the domain administrator or use a custom DNS resolver.