There are multiple ways how you can achieve this:

1. Use outputPath in angular.json
2. Create a shell script, which does it for you.
3. If you are interested in this automatization when you deploy your app and you are using Docker, you can use Dockerfile. It is briefly documented in the last point of the article https://medium.com/@boris.haviar/serving-angular-ssr-with-django-8d2ad4e894be