Add gitlab-ci and Dockerfile

.gitlab-ci.yml

+image: docker:latest
+
+services:
+  - docker:dind
+
+variables:
+    CI_REGISTRY_IMAGE: "registry-gitlab.pasteur.fr/demo/online-course"
+
+before_script:
+  - docker login -u gitlab-ci-token -p "$CI_BUILD_TOKEN" registry-gitlab.pasteur.fr
+
+build:
+  only:
+    - docker
+  stage: build
+  script:
+    - apk update ; apk add git
+    - git checkout master -- requirements.txt
+    - docker build --pull -t "$CI_REGISTRY_IMAGE:testing-ubuntu" .
+    - docker push "$CI_REGISTRY_IMAGE:testing-ubuntu"

Dockerfile

+from ubuntu
+RUN apt-get update
+# RUN yum install -y epel-release
+# RUN yum install install -y python34-pip python34-devel postgresql-server gcc postgresql-devel
+# ADD requirements.txt /requirements.txt
+# RUN pip3 install -r requirements.txt
+