Karma tests fail in CI

[tnation14]

When run in a docker container in CI, yarn test fails with the following error:

yarn test v0.22.0
$ ng test 
07 04 2017 17:56:05.502:WARN [karma]: No captured browser, open http://localhost:9876/  
07 04 2017 17:56:05.520:INFO [karma]: Karma v1.4.1 server started at http://0.0.0.0:9876/
07 04 2017 17:56:05.521:INFO [launcher]: Launching browser Chrome with unlimited concurrency
07 04 2017 17:56:05.643:INFO [launcher]: Starting browser Chrome
07 04 2017 17:56:05.646:ERROR [launcher]: No binary for Chrome browser on your platform.
  Please, set "CHROME_BIN" env variable.

[hectcastro]

See: https://hub.docker.com/r/huli/karma/