v1.0.0-beta.3

The Docker image has changed to use selenium/standalone-chrome as a base instead of having node:8. This should provide more control over what binary versions are actually provided by this image. For example, freezing the version of yarn—if for any reason we ever needed to—is substantially easier. Additionally, the image size has dropped from 452 MB to 397 MB.

> $CHROME_BIN --version
Google Chrome 63.0.3239.132

> node --version
v8.9.4

> npm --version
5.6.0

>yarn --version
1.3.2