Clarify clustering ports and Docker tutorial for new v2 discovery protocol (#1857)#1868

NataliaIvakina merged 1 commit intoneo4j:5.xneo4j/docs-operations:5.xfrom

NataliaIvakina:5.x-clustering-docker-tutorialNataliaIvakina/docs-operations:5.x-clustering-docker-tutorialCopy head branch name to clipboard