Reorganize dockerfile to take advantage of caching

examples/docker/Dockerfile

@@ -1,27 +1,27 @@
 FROM ubuntu:trusty
 
-RUN apt-get update ; \
+CMD ["supervisord"]
+
+RUN sed -i -e 's/archive.ubuntu.com/mirrors.digitalocean.com/' /etc/apt/sources.list ; \
+    apt-get update ; \
     apt-get install -y python3 python3-setuptools python3-requests curl unzip sqlite3 supervisor ; \
     easy_install3 pip ; \
     pip3 install praw pytz ; \
-    cd /tmp ; \
     curl -o /tmp/bitcoinrpc.zip https://codeload.github.com/dpedu/python-bitcoinrpc/zip/master ; \
     unzip bitcoinrpc.zip ; \
     cd python-bitcoinrpc-master ; \
     python3 setup.py install ; \
     useradd bot ; \
-    cd /tmp ; \
-    mkdir pyircbot3.git ; \
-    curl http://gitlab.xmopx.net/dave/pyircbot3/repository/archive.tar.gz | tar zxvf - -C pyircbot3.git --strip-components=1 ; \
-    cd pyircbot3.git/ ; \
-    python3 setup.py install ; \
     mkdir /srv/bot ; \
     chown bot /srv/bot ; \
     echo "[supervisord]" >  /etc/supervisor/conf.d/supervisor.conf ; \
     echo "nodaemon=true" >> /etc/supervisor/conf.d/supervisor.conf ; \
-    su -c "cp -r /tmp/pyircbot3.git/examples/config.json /tmp/pyircbot3.git/examples/data/ /srv/bot/" bot ; \
-    rm -rf /var/lib/apt/lists/* /tmp/bitcoinrpc.zip /tmp/python-bitcoinrpc-master /tmp/pyircbot3.git
+    rm -rf /var/lib/apt/lists/* /tmp/bitcoinrpc.zip /tmp/python-bitcoinrpc-master
 
-ADD pyircbot.conf /etc/supervisor/conf.d/pyircbot.conf
+COPY . /tmp/pyircbot/
 
-CMD ["supervisord"]
+RUN cd /tmp/pyircbot/ ; \
+    python3 setup.py install ; \
+    su -c "cp -r /tmp/pyircbot/examples/config.json /tmp/pyircbot/examples/data/ /srv/bot/" bot ; \
+    cd / ; \
+    rm -rf /tmp/pyircbot