Update user-guide.md
Update user-guide.md
tedyoung/docker-zipkin,itszero/docker-zipkin,openzipkin/docker-zipkin,tedyoung/docker-zipkin,openzipkin/docker-zipkin,itszero/docker-zipkin,jfeltesse-mdsol/docker-zipkin,jfeltesse-mdsol/docker-zipkin