Merge branch 'add-gitlabci-deploy' into 'master'

Add Gitlab CI to automatically build and deploy the website

See merge request !1

.gitlab-ci.yml

@@ -0,0 +1,26 @@
+image: node:7.9
+
+cache:
+  paths:
+    - node_modules/
+
+node-build:
+  stage: build
+  script:
+    - npm install
+    - npm run build
+  artifacts:
+    expire_in: 1 week
+    paths:
+      - build
+
+metalsmith-deploy:
+  image: kyleondy/alpine-rsync
+  stage: deploy
+  tags:
+    - pages
+  only:
+    - master
+  script:
+    - mkdir -p /volumes/output/recettes
+    - rsync -r build/ /volumes/output/recettes