Add Dockerfile

This is a basic Dockerfile based on the standard golang:1.9 image. It
packages and builds the latest libpostal code and data, so its a bit
large as far as Docker images go. However it has the advantage of being
completely self contained.

Dockerfile

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+FROM golang:1.9
+
+# libpostal apt dependencies
+# note: this is done in one command in order to keep down the size of intermediate containers
+RUN apt-get update && \
+    apt-get install -y autoconf automake libtool pkg-config python && \
+    rm -rf /var/lib/apt/lists/*
+
+# install libpostal
+RUN git clone https://github.com/openvenues/libpostal /code/libpostal
+WORKDIR /code/libpostal
+RUN ./bootstrap.sh && \
+    ./configure --datadir=/usr/share/libpostal && \
+    make -j4 && make check && make install && \
+    ldconfig
+
+# bring in and build project go code
+WORKDIR /code/go-whosonfirst-libpostal
+COPY . .
+RUN make bin
+
+# set entrypoint to executable, ensuring the host is set so network requests will work
+# additional parameters can be passed on the command line
+ENTRYPOINT [ "./bin/wof-libpostal-server", "-host", "0.0.0.0" ]