# Install RVM
ADD generated/rvm.asc /tmp/
-RUN gpg --import /tmp/rvm.asc && \
+RUN gpg --no-tty --import /tmp/rvm.asc && \
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 && \