Recompiling assets on the update is needed or main menu appearance may not load properly. This has been mentioned on issues #3722 and #3978.
The command has been tested several by users on those issues and by myself.
Thanks for your time and attention.
sudo -u git -H bundle install --without development test postgres --deployment
sudo -u git -H bundle exec rake db:migrate RAILS_ENV=production
sudo -u git -H bundle exec rake migrate_merge_requests RAILS_ENV=production
+sudo -u git -H bundle exec rake assets:precompile RAILS_ENV=production
```
### 5. Update init.d script with a new one