Update join-nodes.md

Added beta tag.
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Anne Henmi 2018-10-10 10:49:01 -06:00 committed by GitHub
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@ -4,6 +4,10 @@ keywords: guide, swarm mode, node
title: Join nodes to a swarm
---
> BETA DISCLAIMER
>
> This is beta content. It is not yet complete and should be considered a work in progress. This content is subject to change without notice.
When you first create a swarm, you place a single Docker Engine into
swarm mode. To take full advantage of swarm mode you can add nodes to the swarm: