Dockerfile

# Pinned to the latest ruby 2.6.0 version of the Passenger base Docker image
FROM phusion/passenger-ruby26:1.0.6

RUN apt-get update \
    && apt-get upgrade -y -o Dpkg::Options::="--force-confold" \
    && apt-get install -y nodejs tzdata \
    && rm -rf /var/lib/apt/lists/*

ENV RAILS_ENV production
ENV RAILS_SERVE_STATIC_FILES 1

RUN mkdir /home/app/cypress

WORKDIR /home/app/cypress

ADD Gemfile /home/app/cypress/Gemfile
ADD Gemfile.lock /home/app/cypress/Gemfile.lock

RUN chown -R app:app .

RUN su app -c 'bundle install --without development test'

ADD . /home/app/cypress

# If the tmp directory doesn't exist then the app will not be able to run.
# By creating it here it will get chowned correctly by the next declaration.
RUN mkdir -p tmp public/data

# DISABLE_DB disables an initializer that requires the DB to run, so we can precompile in the Docker build phase
# SECRET_KEY_BASE sets a dummy secret key, so that the precompiler (which doesn't need the secret key for anything) can run
RUN RAILS_ENV=production DISABLE_DB=true SECRET_KEY_BASE=precompile_only bundle exec rake assets:precompile

# This line is a duplicate however it is done to significantly speed up testing. With this line twice
# we are able to do the bundle install earlier on which means it is cached more often.
RUN chown -R app:app .
RUN chmod -R 0755 .

RUN mkdir /etc/service/unicorn
ADD docker_unicorn_start.sh /etc/service/unicorn/run
RUN chmod 755 /etc/service/unicorn/run

RUN mkdir /etc/service/cypress_delayed_job_1
ADD docker_delayed_job.sh /etc/service/cypress_delayed_job_1/run
RUN chmod 755 /etc/service/cypress_delayed_job_1/run

# Setup other workers based on first worker. This makes it where tweaking the number of workers
# just requires changing this WORKER_COUNT. Unfortunately does not allow tweaking after build is completed.
ARG WORKER_COUNT=4
RUN if [ $WORKER_COUNT -gt 1 ]; then \
      for i in $(seq 2 1 $WORKER_COUNT); do \
        cp -R /etc/service/cypress_delayed_job_1 /etc/service/cypress_delayed_job_$i; \
      done; \
    fi

EXPOSE 3000