ARG BASE_IMAGE=registry.nulo.in/sutty/rails ARG ALPINE_VERSION=3.13.6 ARG RUBY_VERSION=2.7 ARG RUBY_PATCH=5 FROM ${BASE_IMAGE}:${ALPINE_VERSION}-${RUBY_VERSION}.${RUBY_PATCH} ENV RAILS_ENV production RUN apk add --no-cache libxslt libxml2 tzdata postgresql-libs libstdc++ VOLUME "/srv" EXPOSE 3000 EXPOSE 9394