Update ports.md (#2491)

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Wang Jie 2017-03-29 07:39:00 +08:00 committed by John Mulhausen
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@ -8,7 +8,7 @@ title: Publish and expose service or container ports
In Docker Cloud you can **publish** or **expose** ports in services and
containers, just like you can in Docker Engine (as documented
[here](/engine/reference/run/#expose-incoming-ports) ).
[here](/engine/reference/run/#expose-incoming-ports)).
* **Exposed ports** are ports that a container or service is using either to
provide a service, or listen on. By default, exposed ports in Docker Cloud are