add a makefile for building a docker image

[jakoch]

Add a makefile for building a docker image.
This should enable uses to build the container image manually.

• define vars for each software component
  - A_VERSION ?= latest
  - override version defines in the dockerfile, --build-arg A_VERSION=$(A_VERSION)
  - define DOCKER_BUILDS_ARGS standalone, then use $(DOCKER_BUILD_ARGS) for docker build
DOCKER_BUILD_ARGS = --build-arg A_VERSION=$(A_VERSION) \ --build-arg B_VERSION=$(B_VERSION)
• build
• tag
• push
• clean

Usage maybe:

make build A_VERSION=1.0 B_VERSION=2.3 C_VERSION=4.5
make tag
make push
make clean