Update Dockerfile

added apt-get update to fix deploy failure following update to ubuntu base image
Update Dockerfile

updated based to 14.04 as 12.10 can no longer be updated, which causes the build and deploy to fail
update base image from 12.10 to 14.04. 12.10 can no longer receive
updates and this breaks build/deploy.

add update packages.
Update README.md

Updated Dockerfile to reflect new version
Merge pull request #4 from ianmas-aws/docker

Docker