[ADDED] Dockerfile [ci skip]

This is a first step in getting a Docker image for NATS Streaming.
A repo will soon be created to generate the official image.

Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:1.6.3
+
+MAINTAINER Ivan Kozlovic <[email protected]>
+
+COPY . /go/src/github.com/nats-io/nats-streaming-server
+WORKDIR /go/src/github.com/nats-io/nats-streaming-server
+
+RUN CGO_ENABLED=0 go install -v -a -tags netgo -installsuffix netgo -ldflags "-s -w -X github.com/nats-io/nats-streaming-server/version.GITCOMMIT=`git rev-parse --short HEAD`"
+
+EXPOSE 4222 8222
+ENTRYPOINT ["nats-streaming-server"]
+CMD ["--help"]