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Dockerfile
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FROM ruby:3.3.6-alpine3.19
ENV APP_ROOT /usr/src/app
ENV DATABASE_PORT 5432
WORKDIR $APP_ROOT
# =============================================
# System layer
# Will invalidate cache as soon as the Gemfile changes
COPY Gemfile Gemfile.lock $APP_ROOT/
# * Setup system
# * Install Ruby dependencies
RUN apk add --update \
build-base \
netcat-openbsd \
git \
nodejs \
postgresql-dev \
tzdata \
curl-dev \
libc6-compat \
libarchive-tools \
bash \
&& rm -rf /var/cache/apk/* \
&& gem update --system \
&& gem install bundler foreman \
&& bundle config --global frozen 1 \
&& bundle config set without 'test' \
&& bundle install --jobs 2
# ========================================================
# Application layer
# Copy application code
COPY . $APP_ROOT
# Precompile assets for a production environment.
# This is done to include assets in production images on Dockerhub.
RUN RAILS_ENV=production bundle exec rake assets:precompile
# Startup
CMD ["bin/docker-start"]