heroku FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory code example

Example 1: FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

"scripts": {
    "ng-high-memory": "node --max_old_space_size=8000 ./node_modules/@angular/cli/bin/ng build --configuration=prod",
}

Example 2: FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

"build-serve": "node --max_old_space_size=8048 ./node_modules/@angular/cli/bin/ng serve"