refactor Dockerfile

docker/Dockerfile

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+FROM ubuntu:utopic
+MAINTAINER caktux
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Usual update / upgrade
+RUN apt-get update
+RUN apt-get upgrade -q -y
+RUN apt-get dist-upgrade -q -y
+
+# Let our containers upgrade themselves
+RUN apt-get install -q -y unattended-upgrades
+
+# Install Ethereum
+RUN apt-get install -q -y software-properties-common
+RUN add-apt-repository ppa:ethereum/ethereum
+RUN add-apt-repository ppa:ethereum/ethereum-dev
+RUN apt-get update
+RUN apt-get install -q -y geth
+
+# Install supervisor
+RUN apt-get install -q -y supervisor
+
+# Add supervisor configs
+ADD supervisord.conf supervisord.conf
+
+EXPOSE 8545
+EXPOSE 30303
+
+CMD ["-n", "-c", "/supervisord.conf"]
+ENTRYPOINT ["/usr/bin/supervisord"]

docker/supervisord.conf

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+[supervisord]
+nodaemon=false
+
+[program:geth]
+priority=30
+directory=/
+command=geth --rpc
+user=root
+autostart=true
+autorestart=true
+startsecs=10
+stopsignal=QUIT
+stdout_logfile=/var/log/geth.log
+stderr_logfile=/var/log/geth.err
+
+[unix_http_server]
+file=%(here)s/supervisor.sock
+
+[supervisorctl]
+serverurl=unix://%(here)s/supervisor.sock
+
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface