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Document the need to EXPOSE the proxied port

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Mike Dillon 2015-08-23 18:39:49 -07:00
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README.md
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@ -14,6 +14,8 @@ Then start any containers you want proxied with an env var `VIRTUAL_HOST=subdoma
$ docker run -e VIRTUAL_HOST=foo.bar.com ...
The containers being proxied must [expose](https://docs.docker.com/reference/run/#expose-incoming-ports) the port to be proxied, either by using the `EXPOSE` directive in their `Dockerfile` or by using the `--expose` flag to `docker run` or `docker create`.
Provided your DNS is setup to forward foo.bar.com to the a host running nginx-proxy, the request will be routed to a container with the VIRTUAL_HOST env var set.
If you are using `boot2docker` start `nginx-proxy` with: