add dockerhub deploy

.gitlab-ci.yml

@@ -30,4 +30,14 @@ build:
   except:
     - "master"
 
-# TODO : reste à pusher sur dockerhub
+deploy-dockerhub:
+  stage: "deploy"
+  before_script:
+    - "docker login -u \"$DOCKERHUB_USER\" -p \"$DOCKERHUB_PASSWORD\""
+    - "docker login -u \"$CI_REGISTRY_USER\" -p \"$CI_REGISTRY_PASSWORD\" $CI_REGISTRY"
+  script:
+    - "docker pull \"$CI_REGISTRY_IMAGE\""
+    - "docker tag \"$CI_REGISTRY_IMAGE\" \"$DOCKERHUB_USER/$DOCKERHUB_PROJECT\""
+    - "docker push \"$DOCKERHUB_USER/$DOCKERHUB_PROJECT\""
+  only:
+    - "master"