Small fixes to the project setup

[scheidtdav]

Type of Change

• Dependency upgrade
• Bug fix (non-breaking change)
• Breaking change
  • e.g. a fixed bug or new feature that may break something else
• New feature
• Code quality improvements
  • e.g. refactoring, documentation, tests, tooling, ...

Implementation

• I have added the value from .nvmrc to the build action, such that we don't have to worry about updating node there (it used to build with Node 22 still).
  • it was necessary to remove the "v" in the .nvmrc file for that to work. Thats still a valid value for the file though
• I added minio-data to gitignore to prevent those files from being committed
• I added missing quotes to the .env.example file (just to adhere to the existing format) and fixed a type

Checklist

• I gave this pull request a meaningful title
• My pull request is targeting the dev branch
• I have added documentation to my code
• I have deleted code that I have commented out

Additional Information