Updates doc about config volume (#766)
Updates doc about config volume (#766)

* #2 update content with examples for console and ETL usage

* fix formatting

* add new line at end of license file

* reformatting MD as for PR #489

* fixes link to OrientDB documentation

* upadates part about volumes

* upadates part about volumes on content.md

docker-solr/docs,pydio/docs,jetty-project/docker-docs,pydio/docs,Bonitasoft-Community/docker_docs,Lightstreamer/docs,gprivitera/docs,Lightstreamer/docs,crate/docker-docs,gprivitera/docs,dmetzler/docker-library-docs,tilosp-docker/library-docs,infosiftr/docker-library-docs,jetty-project/docker-docs,zendtech/docs,odoo/docker-docs,car031/docs,crate/docker-docs,avoinea/docs,docker-library/docs,31z4/docs,31z4/docs,docker-flink/docs,infosiftr/docker-library-docs,dinogun/docs,nats-io/docker-docs,docker-solr/docs,davidcurrie/docs,docker-flink/docs,ceejatec/docs,tilosp-docker/library-docs,odoo/docker-docs,avoinea/docs,vmassol/docs,vmassol/docs,ceejatec/docs,Bonitasoft-Community/docker_docs,zendtech/docs,dinogun/docs,docker-library/docs,davidcurrie/docs,car031/docs,dmetzler/docker-library-docs,nats-io/docker-docs