$ make
docker build -t mcandre/potatogresql .
docker exec ec78736c17866d05a185c830ae0e3f44656a0a7674a0c9f2e4f9d040235f9dd8 psql -h $(boot2docker ip) -U postgres -c "SELECT 'Hello World!';"
   ?column?
--------------
 Hello World!
(1 row)

$ sudo apt-get install docker.io build-essential

$ sudo yum install docker-io

$ brew cask install virtualbox vagrant
$ brew install boot2docker

> chocolatey install docker make