Simplify dockerfile

Dockerfile

@@ -1,50 +1,45 @@
 FROM debian:jessie
 
-RUN apt-get update && apt-get install -y python3 git python3-pip \
-	libxml2-dev libxslt1-dev python-dev python-virtualenv locales libffi-dev \
-	build-essential python3-dev zlib1g-dev libssl-dev gettext \
-	libpq-dev libmysqlclient-dev libmemcached-dev libjpeg-dev \
-	aqbanking-tools supervisor nginx sudo \
-	--no-install-recommends
-
-WORKDIR /
-
-RUN dpkg-reconfigure locales && \
+RUN apt-get update && \
+    apt-get install -y python3 git python3-pip \
+	  libxml2-dev libxslt1-dev python-dev python-virtualenv locales libffi-dev \
+	  build-essential python3-dev zlib1g-dev libssl-dev gettext \
+	  libpq-dev libmysqlclient-dev libmemcached-dev libjpeg-dev \
+	  aqbanking-tools supervisor nginx sudo \
+	  --no-install-recommends && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* && \
+    dpkg-reconfigure locales && \
 	locale-gen C.UTF-8 && \
-	/usr/sbin/update-locale LANG=C.UTF-8
-ENV LC_ALL C.UTF-8
-
-RUN apt-get clean && rm -rf /var/lib/apt/lists/*
-
-RUN useradd -ms /bin/bash -d /pretix -u 15371 pretixuser
-RUN echo 'pretixuser ALL=(ALL) NOPASSWD: /usr/bin/supervisord' >> /etc/sudoers
+	/usr/sbin/update-locale LANG=C.UTF-8 && \
+    mkdir /etc/pretix && \
+    mkdir /data && \
+    useradd -ms /bin/bash -d /pretix -u 15371 pretixuser && \
+    echo 'pretixuser ALL=(ALL) NOPASSWD: /usr/bin/supervisord' >> /etc/sudoers && \
+    mkdir /static
 
-RUN mkdir /etc/pretix
-RUN mkdir /data
-VOLUME /etc/pretix
+ENV LC_ALL=C.UTF-8 \
+    DJANGO_SETTINGS_MODULE=production_settings
 
 COPY deployment/docker/pretix.bash /usr/local/bin/pretix
-RUN chmod +x /usr/local/bin/pretix
 COPY deployment/docker/supervisord.conf /etc/supervisord.conf
-
 COPY deployment/docker/nginx.conf /etc/nginx/nginx.conf
-RUN rm /etc/nginx/sites-enabled/default
-
+COPY deployment/docker/production_settings.py /pretix/src/production_settings.py
 COPY src /pretix/src
-WORKDIR /pretix/src
-ADD deployment/docker/production_settings.py /pretix/src/production_settings.py
-ENV DJANGO_SETTINGS_MODULE production_settings
 
-RUN pip3 install -U pip wheel setuptools
-RUN pip3 install -r requirements.txt -r requirements/mysql.txt -r requirements/postgres.txt \
-	-r requirements/memcached.txt -r requirements/redis.txt \
-	-r requirements/py34.txt gunicorn
+RUN chmod +x /usr/local/bin/pretix && \
+    rm /etc/nginx/sites-enabled/default && \
+    pip3 install -U pip wheel setuptools && \
+    cd /pretix/src && \
+    pip3 install -r requirements.txt -r requirements/mysql.txt -r requirements/postgres.txt \
+    	-r requirements/memcached.txt -r requirements/redis.txt \
+	    -r requirements/py34.txt gunicorn && \
+	mkdir -p data && \
+    chown -R pretixuser:pretixuser /static /pretix /data data && \
+	sudo -u pretixuser make production
 
-RUN mkdir /static && chown -R pretixuser:pretixuser /static /pretix /data
 USER pretixuser
-RUN make production
-
+VOLUME ["/etc/pretix", "/data"]
 EXPOSE 80
-
 ENTRYPOINT ["pretix"]
 CMD ["all"]