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Fix mismatch port number describing `EXPOSE 8080`

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shunwen 2020-02-16 20:12:11 +08:00 committed by GitHub
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get-started/part2.md
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@ -128,7 +128,7 @@ The steps above built up the filesystem of our image, but there are other lines
The `CMD` directive is our first example of specifying some metadata in our image that describes how to run a container based on this image. In this case, it's saying that the containerized process that this image is meant to support is `npm start`.
The `EXPOSE 8080` informs Docker that the container is listening on port 8000 at runtime.
The `EXPOSE 8080` informs Docker that the container is listening on port 8080 at runtime.
What you see above is a good way to organize a simple Dockerfile; always start with a `FROM` command, follow it with the steps to build up your private filesystem, and conclude with any metadata specifications. There are many more Dockerfile directives than just the few we see above; for a complete list, see the [Dockerfile reference](https://docs.docker.com/engine/reference/builder/).