Provides a make docker_build target that builds your image locally.
Provides a make dockerhub_push target that pushes your final image to Dockerhub.
The Dockerhub image will tagged <REPOSITORY>:<GIT COMMIT SHA>
If git head has a git tag, the Dockerhub image will also be tagged <IMAGE>:<GIT_TAG>.
To Enable:
Add lyft/docker_build to your boilerplate/update.cfg file.
Add include boilerplate/lyft/docker_build/Makefile in your main Makefile _after your REPOSITORY environment variable
REPOSITORY=<myreponame>
include boilerplate/lyft/docker_build/Makefile(this ensures the extra Make targets get included in your main Makefile)