Ajout d'une stage staging

.gitlab-ci.yml

@@ -24,6 +24,7 @@ cache:
 
 stages:
   - build
+  - tests
   - docker
 
 ### Jobs ###
@@ -40,6 +41,13 @@ build:transpile:
     paths:
       - build/
 
+tests:
+  stage: tests
+  before_script:
+    - export NODE_ENV=staging
+  script:
+    - npm run test
+
 docker:build:
   dependencies: 
     - build:transpile