* added docker image support
* added environment variable support
* added docker instructions
* added .env hint
* use new yadu log handler
* update modules
* bump version
- Meta did not contain condition and category together anymore, they
removed the category. Therefore fetching (that is, validation)
failed.
- Now we extract the condition and category directly.
- On top, category now includes the whole category tree.
- unit tests had to be tweaked for this measure.
