Add CI script.

.gitlab-ci.yml

@@ -0,0 +1,44 @@
+image: docker:stable
+
+services:
+  - docker:stable-dind
+
+variables:
+  DOCKER_DRIVER: overlay2
+
+stages:
+  - build
+  - push
+
+before_script:
+  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+
+Build:
+  script:
+    - docker build --pull -t $CI_REGISTRY_IMAGE:tmp .
+    - docker push $CI_REGISTRY_IMAGE:tmp
+  stage: build
+  tags:
+  - docker
+
+Push latest:
+  only:
+    - master
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:tmp
+    - docker tag $CI_REGISTRY_IMAGE:tmp $CI_REGISTRY_IMAGE:latest
+    - docker push $CI_REGISTRY_IMAGE:latest
+  stage: push
+  tags:
+  - docker
+
+Push tag:
+  only:
+    - tags
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:tmp
+    - docker tag $CI_REGISTRY_IMAGE:tmp $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+  stage: push
+  tags:
+  - docker