Move Gitlab CI from PM2 to supervisord for preprod

.gitlab-ci.yml

@@ -26,8 +26,8 @@ deploy preprod:
                 - rm -rf node_modules/
                 - npm install
                 - cp config.json.default config.json
-                - sudo /usr/bin/pm2 startOrRestart slogan.app.yml
-                - sudo /usr/bin/pm2 show slogan
+                - sudo supervisorctl restart slogan
+                - sudo supervisorctl status slogan
         only:
                 - preprod