Dockerfile

FROM ruby:2.1.2
# Creates a docker container with Ruby and Oracle's Java 7
MAINTAINER Koan Health <development@koanhealth.com>
# We were missing this command
RUN apt-get update && apt-get install -y procps
RUN \
    echo "===> add webupd8 repository..."  && \
    echo "deb http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main" | tee /etc/apt/sources.list.d/webupd8team-java.list  && \
    echo "deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main" | tee -a /etc/apt/sources.list.d/webupd8team-java.list  && \
    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886  && \
    apt-get update  && \
    \
    \
    echo "===> install Java"  && \
    echo debconf shared/accepted-oracle-license-v1-1 select true | debconf-set-selections  && \
    echo debconf shared/accepted-oracle-license-v1-1 seen true | debconf-set-selections  && \
    DEBIAN_FRONTEND=noninteractive  apt-get install -y --force-yes oracle-java7-installer oracle-java7-set-default  && \
    \
    \
    echo "===> clean up..."  && \
    rm -rf /var/cache/oracle-jdk7-installer  && \
    apt-get clean  && \
    rm -rf /var/lib/apt/lists/*

 CMD ["bash"]