Dockerfile

FROM ruby:2.7.6-slim-buster

#to fix: SSL_connect returned=1 errno=0 state=error: dh key too small in OpenSSL
RUN sed -i 's/DEFAULT@SECLEVEL=2/DEFAULT@SECLEVEL=1/' /etc/ssl/openssl.cnf

# Common dependencies
RUN apt-get update -qq \
  && DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends \
    build-essential \
    gnupg2 \
    curl \
    lsb-release \
  && apt-get clean \
  && rm -rf /var/cache/apt/archives/* \
  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
  && truncate -s 0 /var/log/*log

RUN echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list \
&& curl -sSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client-12 libpq-dev

ENV APP_HOME /app
RUN mkdir $APP_HOME
WORKDIR $APP_HOME

RUN gem install bundler:2.2.25
ADD Gemfile* $APP_HOME/
RUN bundle install

COPY . ./

EXPOSE 3001

ENTRYPOINT ["/app/docker/docker-entrypoint.sh"]
CMD ["rails", "server", "-b", "0.0.0.0"]