Create a set of Dart dockerfiles

hello/README.md

+# google/dart-hello
+
+[`google/dart-hello`](https://index.docker.io/u/google/dart-hello) is a
+[docker](https://docker.io) image for a simple Dart HTTP server.
+
+It is based on
+[`google/dart-runtime`](https://index.docker.io/u/google/dart-runtime)
+base image and listen on port `8080`.
+
+## Run the Dart HTTP server in the docker container
+
+Run the following command to start the server application:
+
+    docker run -d -p 8080:8080 google/dart-hello
+
+## Access the server
+
+If you are using boot2docker you need to access the server on the
+doot2docker host network. The command `boot2docker ip` will give the
+hosts address on that network.
+
+    curl http://`boot2docker ip 2> /dev/null`:8080/version
+
+If you are running the docker daemon directly on a Linux host you can
+access the server on `localhost`
+
+    curl http://localhost:8080/version