chore(readme): add some documentation
chore(readme): add some documentation

nagyistoce/camunda-bpm-elasticsearch,camunda/camunda-bpm-elasticsearch,nagyistoce/camunda-bpm-elasticsearch,camunda/camunda-bpm-elasticsearch,nagyistoce/camunda-bpm-elasticsearch,camunda/camunda-bpm-elasticsearch,nagyistoce/camunda-bpm-elasticsearch,camunda/camunda-bpm-elasticsearch