Update .gitlab-ci.yml

.gitlab-ci.yml

 image: node:latest
 
+stages:
+  - build  # Jobs placed in build-stage will run first
+  - test   # Jobs placed in test-stage will run after build-jobs
+  - deploy # Jobs placed in build-stage will run last after test-jobs
+
+install:
+  stage: build
+  script:
+    - npm install
+  # Keep node_modules-folder for the following stages:
+  artifacts:
+    paths:
+      - node_modules
+
+test:
+  stage: test # Job test will run in parallel with the job flow
+  script:
+    - npm test
+
+flow:
+  stage: test # Job flow will run in parallel with the job test
+  script:
+    - npm install --global flow-bin
+    - flow check
+
 deploy:
+  stage: deploy
   script:
     - mkdir ~/.ssh
     - echo "$SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
@@ -10,5 +36,7 @@ deploy:
     - apt-get update
     - apt-get install --assume-yes rsync
     - rsync --archive --delete --exclude='.git' --exclude='node_modules' . app1@129.241.96.149:app
+    - ssh app1@129.241.96.149 systemctl --user restart app
   only:
-    - master
\ No newline at end of file
+    - master
+