docker build of protobuf with bazel

Dockerfile

FROM ubuntu:15.10
RUN \
 apt-get update && \
 apt-get install --no-install-recommends -y openjdk-8-jre-headless && \
 apt-get install --no-install-recommends -y gcc-4.9 && \
 apt-get install --no-install-recommends -y g++-4.9 && \
 apt-get install --no-install-recommends -y wget && \
 apt-get install --no-install-recommends -y unzip && \
 apt-get install --no-install-recommends -y openjdk-8-jdk && \
 apt-get install --no-install-recommends -y git && \
 apt-get install --no-install-recommends -y rsync && \
 apt-get install --no-install-recommends -y less && \
 apt-get clean && \
 wget 'https://github.com/bazelbuild/bazel/releases/download/0.2.0/bazel-0.2.0-installer-linux-x86_64.sh' && \
 bash bazel-0.2.0-installer-linux-x86_64.sh && \
 ln -s /usr/bin/gcc-4.9 /usr/bin/gcc && \
 ln -s /usr/bin/g++-4.9 /usr/bin/g++
RUN \
 /bin/bash -c " \
 export VERBOSE_BLAZE_CLIENT=1 && \
 export HOSTNAME=unknown && \
 cat /etc/hosts > hosts.tmp && \
 sed -e s/`hostname`/ci/ < hosts.tmp > /etc/hosts && \
 set -e && \
 set -o pipefail && \
 git clone https://github.com/google/protobuf.git && \
 cd protobuf && \
 bazel --batch build --genrule_strategy=standalone --spawn_strategy=standalone //:protobuf_lite | cat && \
 bazel --batch build --genrule_strategy=standalone --spawn_strategy=standalone --check_up_to_date //:protobuf_lite | cat && \
 true \
"