add gitlab-ci

.gitlab-ci.yml

+stages:
+  - verify
+  - build
+
+Check Makefile:
+  stage: verify
+  tags:
+    - shell, docker
+  script:
+    - docker run --rm -v "${PWD}:/work" -w /work mandrean/checkmake ./Makefile
+
+Lint and Validate dockerfiles:
+  stage: verify
+  tags:
+    - shell, docker
+  script:
+    - make test
+
+Make All Images:
+  stage: build
+  image: projectatomic/dockerfile-lint
+  tags:
+    - shell, docker
+  script:
+    - make 
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