bump version to v3.2.4

fix release publication action.

fix central maven repo links

Merge branch 'dev' into beta

Merge remote-tracking branch 'origin/beta' into stable

Merge pull request #46 from openbase/feature/increase_maven_timeouts_…

…to_stableize_docker_build

add some maven props to improve docker build

remove readme redundancies and link to documentation.

fix demo server