add improved docker version

Dockerfile

@@ -1,12 +1,32 @@
 # Radicale Dockerfile
 #
-# VERSION 0.1
+# VERSION 0.2
 
-FROM debian
+FROM 	debian:latest
 
-COPY . /opt/radicale
-WORKDIR /opt/radicale
+ENV 	DEBIAN_FRONTEND noninteractive
 
-CMD python -u radicale.py
+# Base packages
+RUN 	apt-get update -qq && apt-get upgrade -y -qq
+RUN 	apt-get install -y --no-install-recommends git ca-certificates python2.7 python-setuptools python-pip \
+	build-essential libffi-dev python-dev
 
-EXPOSE 5232
+# Radicale installation
+RUN 	pip install passlib bcrypt
+RUN	mkdir -p /data/config && \ 
+	cd /data
+COPY 	. /data/radicale
+COPY	config /data/config
+RUN	cd /data/radicale && python2.7 setup.py install
+
+# User
+RUN 	useradd -d /home/radicale -m radicale && \
+	mkdir -p /home/radicale/.config && \
+ 	ln -s /data/config /home/radicale/.config/radicale && \
+ 	chown -R radicale:radicale /data/config && \
+	chown -R radicale:radicale /home/radicale
+ 
+USER 	radicale
+WORKDIR	/home/radicale
+
+CMD 	["radicale", "-D", "-C", "/data/config/config"]