fixed cicd pipeline pm2 restart

.gitlab-ci.yml

@@ -2,7 +2,8 @@ pages-devel:
   stage: deploy
   script:
     - npm install
-    - pm2 restart ./app.js
+    - pm2 delete ./app.js
+    - pm2 start ./app.js
     - pm2 save
   tags: 
     - testing