Update entrypoint.sh, Dockerfile, README.md files

Dockerfile

@@ -2,7 +2,7 @@ FROM python:2-alpine
 MAINTAINER Michał "rysiek" Woźniak <rysiek@hackerspace.pl>
 
 # we need git
-RUN apk add --no-cache git
+RUN apk add --no-cache git bash
 
 # add Matomo log analytics
 RUN git clone --single-branch --branch 3.x-dev https://github.com/matomo-org/matomo-log-analytics.git /opt/matomo-log-analytics

README.md

 # Docker Matomo Log Analytics
 
-Matomo's [log analytics](https://matomo.org/log-analytics/), dockerized.
\ No newline at end of file
+Matomo's [log analytics](https://matomo.org/log-analytics/), dockerized.

entrypoint.sh

+#!/bin/bash
+