Custom error page for /git/ endpoints

[maximiliansoelch]

Describe the bug

When navigating to a /git endpoint (e.g. https://artemis.cit.tum.de/git/foo/), the following error message is displayed:

To Reproduce

1. Go to 'https://artemis.cit.tum.de/git/foo/'
2. See the meaningless error message

Expected behavior

One solution when visiting this endpoint could be to redirecting to the dashboard and displaying an error message popup.

Screenshots

No response

Which version of Artemis are you seeing the problem on?

7.0.0

What browsers are you seeing the problem on?

Chrome, Safari, Firefox

Additional context

No response

Relevant log output

No response