* Reference paths relative to the current script or project root
Before this PR:
- some scripts change the current working directory and use relative paths
- different approaches are taken to know which directory a script is running in
- paths are sometimes relative, sometimes absolute, sometimes traversing directories
After this PR:
- scripts do neither change nor care much about the current working directory
- a unified approach determines the directory of the current script
- paths are always relative to the project root
This should resolve an issue I already tried to fix with https://github.com/getsentry/self-hosted/pull/1798,
where the contents of `./sentry` were not copied
into the built container image,
thus `enhance-image.sh` did not apply.
Co-authored-by: Amin Vakil <info@aminvakil.com>
