I have installed http-server globally.
http-server
I launch it from myDir on localhost port 8080. In myDir I have index.html
index.html
A bit after the war, but anyway. for angular app, I suggest to add to your package.json:
"serve-prod": "cp dist/app-name/index.html dist/app-name/404.html && http-server dist/app-name"
Then call
npm run serve-prod