Adding gitlab-ci build config

Author: Maescool

.gitlab-ci.yml

@@ -0,0 +1,24 @@
+image: docker:latest
+services:
+  - docker:dind
+variables:
+  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
+before_script:
+  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+stages:
+  - build
+  - release
+build:
+  type: build
+  script:
+    - docker build --pull -t $CONTAINER_TEST_IMAGE .
+    - docker push $CONTAINER_TEST_IMAGE
+release-image:
+  stage: release
+  script:
+    - docker pull $CONTAINER_TEST_IMAGE
+    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_RELEASE_IMAGE
+    - docker push $CONTAINER_RELEASE_IMAGE
+  only:
+    - master