Dockerfile

FROM ruby:2.6.5-alpine

MAINTAINER Klaus Meyer <spam@klaus-meyer.net>

ARG SOURCE_COMMIT
ENV SOURCE_COMMIT $SOURCE_COMMIT

ENV PORT 8080
ENV SSL_PORT 8443
ENV RAILS_ENV production
ENV SECRET_KEY_BASE changeme
ENV RAILS_SERVE_STATIC_FILES true
ENV RAILS_LOG_TO_STDOUT true

EXPOSE $PORT
EXPOSE $SSL_PORT

WORKDIR /app

RUN apk update \
&& apk add build-base zlib-dev tzdata nodejs yarn openssl-dev \
&& rm -rf /var/cache/apk/*

COPY Gemfile Gemfile.lock ./

RUN gem install bundler \
&& bundle config --local build.sassc --disable-march-tune-native \
&& bundle install --without development test

COPY . .
RUN bundle exec rake assets:precompile \
&& addgroup -S app && adduser -S app -G app -h /app \
&& chown -R app.app /app \
&& chown -R app.app /usr/local/bundle \
&& apk del build-base yarn

USER app

CMD puma -C config/puma.rb