Refactor docker_build stage
Refactor docker_build stage

sprucedev/DockCI,sprucedev/DockCI,RickyCook/DockCI,RickyCook/DockCI,sprucedev/DockCI,RickyCook/DockCI,RickyCook/DockCI,sprucedev/DockCI-Agent,sprucedev/DockCI,sprucedev/DockCI-Agent