Move Gitlab CI from PM2 to supervisord for prod

.gitlab-ci.yml

@@ -42,8 +42,8 @@ deploy prod:
                 - rm -rf node_modules/
                 - npm install --production
                 - 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:
                 - master