Angular deploy with custom commands

I'm trying to deploy an Angular project on Firebase App Hosting, using custom build commands for both production and development environments.

I created two configuration files:

apphosting.production.yaml

apphosting.development.yaml

Each file is associated with a backend configured for its respective environment (production or development).

apphosting.development.yaml
```
scripts:
buildCommand: npm install && ng build --configuration development
```
apphosting.production.yaml
```
scripts:
buildCommand: npm install && ng build --configuration production
```
The build seems to work, but after deploying, when I access the app, I get this error on the page:

```
Service Unavailable
or Error: Server Error
The server encountered an error and could not complete your request.
Please try again in 30 seconds.
```
Has anyone experienced something similar or knows what might be causing this?

The only relevant documentation I found is here:
👉 https://firebase.google.com/docs/app-hosting/configure?hl=pt-br#override-scripts

Any help would be appreciated!