Needs a Dockerfile

[dkegel-fastly]

https://github.com/jesuscmartinez/docker-firing-range has a Dockerfile that works, but only up to
commit c7033ad.

I adapted it to use the build context's copy of firing-range:

FROM ubuntu:trusty
RUN apt-get update \
 && apt-get install -y -qq wget unzip ant git openjdk-7-jdk \
 && apt-get clean
RUN wget https://storage.googleapis.com/appengine-sdks/featured/appengine-java-sdk-1.9.24.zip \
 && unzip appengine-java-sdk-1.9.24.zip \
 && rm appengine-java-sdk-1.9.24.zip
WORKDIR appengine-java-sdk-1.9.24/demos/firing-range
COPY build.xml build.xml
COPY src src
COPY WEB-INF WEB-INF
EXPOSE 8080
CMD ["sh", "-c", "ant -Daddress=0.0.0.0 runserver && while true; do sleep 10000; done"]

The next commit, fe45c38, ported firing-range to java 8, and I couldn't figure out how to get firing-range working with that in Docker. My experience with Java predates ant... and I'm allergic to xml :-)