Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request

Versions.

@angular/cli: 1.4.3
node: 6.10.1
Windows 10
os: win32 x64
@angular/common: 4.4.6
@angular/compiler: 4.4.6
@angular/core: 4.4.6
@angular/forms: 4.4.6
@angular/http: 4.4.6
@angular/platform-browser: 4.4.6
@angular/platform-browser-dynamic: 4.4.6
@angular/router: 4.4.6
@angular/service-worker: 1.0.0-beta.16
@angular/cli: 1.4.3
@angular/compiler-cli: 4.4.6
typescript: 2.4.2

Repro steps.

The log given by the failure.

Desired functionality.

Config option required to configure dynamic content(ajax calls) in angular-cli service worker like the one we have in workbox. Currently we need to eject cli project to use workbox and sometimes there is need to use cli commands.

Mention any other details that might be useful.