Enhance ci and docker

[Lukas113]

• Bugfix: assumption of conda-build CI to be a clean commit
• Removed conda-installation location assumption in CI's as far as possible
• Enhanced container documentation

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 67.50%. Comparing base (3db1577) to head (0b7d794).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #579 +/- ## ======================================= Coverage 67.50% 67.50% ======================================= Files 51 51 Lines 5185 5185 ======================================= Hits 3500 3500 Misses 1685 1685 ```

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[Lukas113]

Partially because I wanted to wait, and partially because I was too lazy 😅