Add nginx error pages to the repo
Story Points: 2
As a user I want to receive an appealing error message when a page or link does not exist so that I know approximately why the page does not work.
- Show an error Message if the server request fails.
- Show a Message what can I do.
- Two animations for 50x and application is updated.
- Design error pages.
- Refer to the error pages.
These pages should be deployed to the server. They include:
- An error Message if the app crashed "Contact the Administrator"
- A Notification that cards is being updated. Requires adjustments to the appctl scripts on the server