ruby ruby-irb \
su-exec==${SU_EXEC_VERSION} \
dumb-init==${DUMB_INIT_VERSION} \
+ libffi-dev \
&& apk add --no-cache --virtual .build-deps \
build-base \
ruby-dev \
wget \
gnupg \
- libffi-dev \
&& update-ca-certificates \
&& echo 'gem: --no-document' >> /etc/gemrc \
&& gem install oj -v 2.18.3 \