Fix permissions of etcd home directory

etcd-cluster-appliance/Dockerfile

@@ -1,15 +1,19 @@
 FROM zalando/ubuntu:14.04.1-1
 
+ENV USER etcd
+ENV HOME /home/${USER}
+ENV ETCDVERSION 2.0.11
+
 ## Install python
 RUN apt-get update && apt-get -y install python python-boto
 
 ## Install etcd
-RUN useradd -d /home/etcd -k /etc/skel -s /bin/bash -m etcd
-ENV ETCDVERSION 2.0.11
 RUN curl -L https://github.com/coreos/etcd/releases/download/v${ETCDVERSION}/etcd-v${ETCDVERSION}-linux-amd64.tar.gz | tar xz -C /bin --strip=1 --wildcards --no-anchored etcd etcdctl
 EXPOSE 2379 2380
 
 ADD etcd.py /bin/etcd.py
 
-USER etcd
+RUN useradd -d ${HOME} -k /etc/skel -s /bin/bash -m ${USER} && chmod 777 ${HOME}
+WORKDIR $HOME
+USER ${USER}
 CMD ["/bin/etcd.py"]