feat(rust): add rust compiler

Makefile

@@ -1,17 +1,17 @@
 # VERSION
 # If no version is specified as a parameter of make, the value latest
 # is taken.
-VERSION:=$(or ${TRAVIS_TAG}, ${TRAVIS_TAG}, latest)
+VERSION:=$(or ${TRAVIS_TAG}, latest)
 
 # DOCKER_USER
 DOCKER_USER:=volkerraschek
 
-build:
+image-build:
 	docker build \
 		--no-cache \
 		--tag ${DOCKER_USER}/build-image:${VERSION} \
 		.
 
-push: build
+image-push: image-build
 	docker login --username ${DOCKER_USER} --password ${DOCKER_PASSWORD}
 	docker push ${DOCKER_USER}/build-image:${VERSION}