更新docker和docker-compose

更新 docker:

    $ sudo apt-get update
    $ sudo apt-get install apt-transport-https ca-certificates
    $ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
    $ sudo vim /etc/apt/sources.list.d/docker.list
    # for ubuntu 14.04 改成 deb https://apt.dockerproject.org/repo ubuntu-trusty main
    $ sudo apt-get upgrade docker-engine



更新 docker-compose:

    $ sudo pip install -U docker-compose