add support to generate docker image for artifactbroker

. add Dockerfile to describe the docker image steps
. add build_image.sh to wrap the generation of image
. Use Alpine as base docker image in distribution to make
  it small

Change-Id: I8a2c8321be176d549063e6ab296adcacb46b9ad3
Issue-ID: MULTICLOUD-548
Signed-off-by: liboNet <libo.zhu@intel.com>
3 files changed