Update dockerfile

examples/docker/Dockerfile

@@ -4,27 +4,26 @@ ENTRYPOINT ["/usr/local/bin/pyircbot"]
 WORKDIR /srv/bot/
 CMD ["-c", "config.json"]
 
-RUN useradd bot ; \
-    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 ; \
-    easy_install3 pip ; \
-    pip3 install praw pytz ; \
-    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 ; \
-    mkdir /srv/bot ; \
-    chown bot /srv/bot ; \
-    rm -rf /var/lib/apt/lists/* /tmp/bitcoinrpc.zip /tmp/python-bitcoinrpc-master
+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 && \
+    easy_install3 pip && \
+    pip3 install praw pytz && \
+    cd /tmp && \
+    curl -o bitcoinrpc.tar.gz https://codeload.github.com/dpedu/python-bitcoinrpc/tar.gz/master && \
+    tar zxvf bitcoinrpc.tar.gz && \
+    cd python-bitcoinrpc-master && \
+    python3 setup.py install && \
+    useradd --home-dir /srv/bot bot && \
+    chown bot /srv/bot && \
+    rm -rf /var/lib/apt/lists/* /tmp/bitcoinrpc.tar.gz /tmp/python-bitcoinrpc-master
 
 COPY . /tmp/pyircbot/
 
-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 / ; \
+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
 
 USER bot