Can you add a quick comment about what this does? I assume website contributors are not all Docker fluent (I'm not).
[Docker docs](https://docs.docker.com/v17.09/engine/reference/commandline/create/) describe it as "Publish a container’s port(s) to the host", although I don't find that totally intuitive. Would it be correct to say something like: "Specify `-PpublishJekyllPort` on the Gradle commandline to serve the website locally at http://localhost:4000"; ? Is my understanding correct that if this option isn't specified, the served website is inaccessible? That seems not very usable. [ Full content available at: https://github.com/apache/beam/pull/6533 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
