Dockerfile

# ------------------------------------------------------------------------------
# base
# ------------------------------------------------------------------------------
FROM ruby:3.3.6 AS base

ARG RAILS_ENV
ARG NODE_MAJOR

ENV APP_HOME=/app
ENV DEPS_HOME=/deps

ENV NODE_MAJOR=${NODE_MAJOR:-22}
ENV RAILS_ENV=${RAILS_ENV:-production}
ENV NODE_ENV=${RAILS_ENV:-production}

# Setup Node installation
# https://github.com/nodesource/distributions#installation-instructions
#
# depdends on ca-certificates, curl and gnupg
#

RUN mkdir -p /etc/apt/keyrings/ && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg

RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${NODE_MAJOR}.x nodistro main" \
| tee /etc/apt/sources.list.d/nodesource.list

# Setup Yarn installation
# https://classic.yarnpkg.com/lang/en/docs/install/#debian-stable
#
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list

# Install system packages
#
RUN apt-get update && apt-get install -qq -y \
  build-essential \
  libpq-dev \
  nodejs \
  yarn \
  --fix-missing --no-install-recommends

# Install Firefox and Gecko driver if RAILS_ENV=test
RUN \
  if [ "${RAILS_ENV}" = "test" ]; then \
     apt-get install -qq -y --fix-missing firefox-esr shellcheck; \
  fi

ARG gecko_driver_version=0.31.0

RUN \
  if [ "${RAILS_ENV}" = "test" ]; then \
    wget https://github.com/mozilla/geckodriver/releases/download/v$gecko_driver_version/geckodriver-v$gecko_driver_version-linux64.tar.gz && \
    tar -xvzf  geckodriver-v$gecko_driver_version-linux64.tar.gz && \
    rm geckodriver-v$gecko_driver_version-linux64.tar.gz && \
    chmod +x geckodriver && \
    mv geckodriver* /usr/local/bin; \
  fi

RUN echo "\nexport PATH=/usr/local/bin:\$PATH\n\n# Stop here if non-interactive shell\n[[ \$- == *i* ]] || return\n\ncd /app" >> ~/.bashrc

# ------------------------------------------------------------------------------
# dependencies
# ------------------------------------------------------------------------------
FROM base AS dependencies

# Set up install environment
RUN mkdir -p ${DEPS_HOME}
WORKDIR ${DEPS_HOME}
# End


# Install Ruby dependencies
COPY .ruby-version ${DEPS_HOME}/.ruby-version
COPY Gemfile ${DEPS_HOME}/Gemfile
COPY Gemfile.lock ${DEPS_HOME}/Gemfile.lock

RUN gem update --system 3.3.5
RUN gem update rake 13.0.6
RUN gem install bundler -v 2.3.9

RUN bundle config set frozen 'true'

# Configure bundler for the environment
RUN if [ ${RAILS_ENV} = "production" ]; then \
  bundle config set without 'development test'; \
  elif [ ${RAILS_ENV} = "test" ]; then \
  bundle config set without 'development'; \
  else \
  bundle config set without 'test'; \
  fi

RUN bundle config
RUN bundle install --retry 3 --jobs 4
# end

# Install JavaScript dependencies
COPY package.json ${DEPS_HOME}/package.json
COPY yarn.lock ${DEPS_HOME}/yarn.lock
RUN yarn install
#end

# ------------------------------------------------------------------------------
# web
# ------------------------------------------------------------------------------
FROM dependencies AS web

# Set up install environment
RUN mkdir -p ${APP_HOME}
WORKDIR ${APP_HOME}
# end

COPY . ${APP_HOME}

# This must be ordered before rake assets:precompile
RUN cp -R $DEPS_HOME/node_modules $APP_HOME/node_modules
RUN cp -R $DEPS_HOME/node_modules/govuk-frontend/govuk/assets $APP_HOME/app/assets

# We need a secret key, database url and Redis url to compile assets, these are
# not used in the running application
RUN if [ ${RAILS_ENV} = "production" ]; then \
  DOMAIN="stand-in.local" \
  SECRET_KEY_BASE="super secret" \
  DATABASE_URL="postgres://stand-in:5432" \
  REDIS_URL="redis://stand-in.local:6379" \
  bundle exec rake assets:precompile --quiet; \
  fi

# create tmp/pids
RUN mkdir -p tmp/pids

ARG current_sha
ARG time_of_build

ENV CURRENT_SHA=$current_sha
ENV TIME_OF_BUILD=$time_of_build

# db setup
COPY ./docker-entrypoint.sh /
RUN chmod +x /docker-entrypoint.sh
ENTRYPOINT ["/docker-entrypoint.sh"]

EXPOSE 3000

CMD ["bundle", "exec", "puma"]