Add initial docker setup for pgsql, mq, redis

redis/Dockerfile

@@ -0,0 +1,18 @@
+FROM debian:stretch
+LABEL maintainer "Jan Dittberner <jan@dittberner.info>"
+
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    dumb-init \
+    redis-server \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*.*
+
+EXPOSE 6379
+
+VOLUME /var/lib/redis
+COPY redis.conf /etc/redis/redis.conf
+COPY startup.sh /srv/
+
+ENTRYPOINT ["dumb-init"]
+CMD "/srv/startup.sh"