Create log file for VCSException

In case there is a VCS error (git tag not found), create a log file in
the F-Droid repo so it is shown on the monitor (currently 404).
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f