RUN /usr/bin/apt-get update && /usr/bin/apt-get install -q -y python2.7-dev python3 python-setuptools python3-setuptools libcurl4-gnutls-dev curl git libattr1-dev libfuse-dev libpq-dev python-pip unzip
# Install RVM
-RUN gpg --keyserver pool.sks-keyservers.net --recv-keys D39DC0E3 && \
+RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys D39DC0E3 && \
curl -L https://get.rvm.io | bash -s stable && \
/usr/local/rvm/bin/rvm install 2.3 && \
/usr/local/rvm/bin/rvm alias create default ruby-2.3 && \