chore(awsDevSubnet): put docker into gocd-agent

docker-in-docker additions based on jpetazzo/dind@e66482ffdd96eb2
chore(awsDevSubnet): experiment app deployment using registry
chore(awsDevSubnet): tune docker-in-docker setup
chore(awsDevSubnet): use same deploy script for test and demo
Merge pull request #14 from HSLdevcom/deploy-demo

Deploy demo