quiz

1. Either build the image yourself:

   git clone https://github.com/Tony-SPWR/quiz
   cd quiz
   docker build -t tonyspwr/quiz . # may need sudo

   OR pull the image from docker hub:

   docker pull tonyspwr/quiz:latest

2. (may need sudo) docker run -it tonyspwr/quiz /bin/bash
3. ./build.sh should succeed
4. CC=arm-linux-gnueabihf-gcc ./build.sh will fail - why, and what needs changing?