Amplify Front End Multi-Environments deployment

**Which Category is your question related to?**
Multi Environment Deployments

**Amplify CLI Version**
4.13.1

**Provide additional details e.g. code snippets**
I am using different environment in my Font End Angular8 app and to build it in different environments, we have multiple commands like:

"build": "ng build --prod --configuration=dev",
"build-test": "ng build --prod --configuration=test",

But when I run amplify publish, the Build command in project-config.json is:

**npm run-script build**

so this will only run with the dev configuration.

What is the best way to run it with the"test" configuration other than creating a new branch and changing the BuildCommand in that branch.