Update content.md (#714)
Update content.md (#714)

* Update content.md
* markdown formatting

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