With this change we do several changes to the `angular.json` configuration for `build` , `server` and `app-shell` targets so that these are `production` by default.
- build, server and app-shell targets are configured to run production by default.
- We add a new configuration named `development` to run the mentioned builder targets in development. Ex: `ng build --configuration development`.
- When adding `universal` or `app-shell`, we generate the full set of configurations as per the `buiid` target. Previously, we only generated the `production` configuration.
- We added a helper script in `package.json` to run build in watch mode. `npm run watch` which is a shortcut for `ng build --watch --configuration development`
