add docker image

docker/Dockerfile

@@ -0,0 +1,14 @@
+FROM alpine:3.6
+
+RUN apk add --no-cache --update apache2-utils
+COPY docker/*_user rest-server /usr/bin/
+COPY docker/entry.sh /
+
+ENV DATA_DIRECTORY=/data
+ENV PASSWORD_FILE=/data/.htpasswd
+
+VOLUME /data
+
+EXPOSE  80
+
+ENTRYPOINT ["/entry.sh"]