refactor(config): print error with all available environments if the configured active environment is missing

Resolve "CheckStyle Konfiguration"

See merge request !32

Lizenzangaben via REUSE

See merge request !24

Resolve "Deklaration der Ziel JVM Version"

See merge request !26

Resolve "Mehrfache Deklaration der JUnit Jupiter Abhängigkeiten"

See merge request !25

Merge branch '5-alle-plugins-die-im-build-verwendet-werden-mithilfe-pluginmanagement-festlegen' into 'main'

Resolve "Alle Plugins die im Build verwendet werden mithilfe pluginManagement festlegen"

See merge request !27

Entferne OpenAPI-Modul

See merge request !28

Resolve "Angabe im README nicht korrekt"

See merge request !29

Resolve "Enum mit Static Field / Static Initializer"

See merge request !30

Prüfung von öffentlichen Schlüsseln und Zertifikatsketten

See merge request !6

- Rework der Applicationconfig zu yaml

Update jackson.version to v2.13.4

See merge request !23

Update dependency org.apache.tika:tika-core to v2

See merge request !22

Update dependency com.nimbusds:nimbus-jose-jwt to v9.24.3

See merge request !17

# Conflicts:
#	pom.xml

Update dependency org.mockito:mockito-core to v4.7.0

See merge request !20