Add .gitlab-ci.yml

.gitlab-ci.yml

+# default template
+# The docker image will be named after the branch name
+# Feel free to modify this file in your own branch
+
+image: docker:latest
+services:
+  - docker:dind
+  
+variables:
+  CI_REGISTRY_IMAGE: "registry-gitlab.pasteur.fr/dsi-tools/docker-images"
+
+before_script:
+ - docker login -u gitlab-ci-token -p "$CI_BUILD_TOKEN" registry-gitlab.pasteur.fr
+ 
+build:
+  except:
+    - master
+  stage: build
+  script:
+    - docker build --pull -t "$CI_REGISTRY_IMAGE:$CI_BUILD_REF_NAME" .
+    - docker push "$CI_REGISTRY_IMAGE:$CI_BUILD_REF_NAME"