quick readme

README.md

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+h1. docker-tor-hidden-service
+
+Create a tor hidden service with a link
+
+```
+$ # run a container with an network application
+$ docker run -d --name hello_world tutum/hello_world
+$ # and just link it to this container
+$ docker run -ti --link hello_world goldy/tor-hidden-service
+```
+
+The .onion url is displayed to stdout at startup.
+
+To keep onion keys, just mount volume `/var/lib/tor/hidden_service/`
+
+```
+$ docker run -ti --link something --volume /path/to/keys:/var/lib/tor/hidden_service/ goldy/tor-hidden-service
+```