Add serving parameters so the site is available from other devices

With this parameter, you can hit your machine's IP address from any device on the same network. For example, I can access my local dev site from http://192.168.0.129:8080 from my mobile phone. Then, I can test the mobile-friendliness of the design.

Test Plan:
See above.
Merge remote-tracking branch 'upstream/master'
First pass at mobile-optimizing the card review page

The biggest change was removing the programmatic styling using the `position.x` and `position.y` properties. I moved those into corresponding CSS definitions.
Merge remote-tracking branch 'upstream/master'
Merge pull request #7 from MattFaus/master

Mobile viewing optimizations