Move container build files into their own dir and introduce the scope script.

docker/Dockerfile

@@ -0,0 +1,11 @@
+FROM gliderlabs/alpine
+MAINTAINER Weaveworks Inc <help@weave.works>
+WORKDIR /home/weave
+RUN apk add --update supervisor
+RUN ["sh", "-c", "rm -rf /var/cache/apk/*"]
+ADD supervisord.conf /etc/
+ADD ./app /home/weave/
+ADD ./probe /home/weave/
+ADD ./entrypoint.sh /home/weave/
+EXPOSE 4040
+ENTRYPOINT ["/home/weave/entrypoint.sh"]