first version of docker support

contrib/docker/runtime/Dockerfile

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+FROM debian
+
+RUN apt-get update
+RUN apt-get install -y curl
+
+LABEL maintainer "ebusd@ebusd.eu"
+
+RUN mkdir /etc/ebusd \
+    && curl -SL https://github.com/john30/ebusd-configuration/archive/master.tar.gz \
+    | tar xz --strip-components=3 -C /etc/ebusd ebusd-configuration-master/ebusd-2.1.x/de
+
+ENV EBUSD_VERSION 3.0pre
+ENV EBUSD_ARCH amd64
+COPY ebusd-${EBUSD_VERSION}_${EBUSD_ARCH}.deb ebusd.deb
+
+RUN dpkg -i ebusd.deb
+
+EXPOSE 8888
+
+COPY docker-entrypoint.sh /
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["-f", "--scanconfig"]

contrib/docker/runtime/docker-entrypoint.sh

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+#!/bin/bash
+set -e
+
+if [ "${1#-}" != "$1" ]; then
+	set -- ebusd "$@"
+fi
+
+exec "$@"