FROM ruby:2.6.3-alpine as builder

# Add git to clone Rspec repositories and build-base to compile nokogiri gem
# Additionally, we need to set timezone information
RUN apk add --update git build-base postgresql-dev yarn tzdata && \
      cp /usr/share/zoneinfo/UTC /etc/localtime && \
      echo "UTC" > /etc/timezone

# Make an app directory, just like Heroku.
RUN mkdir /app
WORKDIR /app

# Copying the Gemfile separately allows the image to be cached.
# These steps are not rerun unless the Gemfile or Gemfile.lock is changed.
COPY Gemfile Gemfile.lock /app/
RUN bundle install --jobs 4 --retry 5 --without development test

# Again, copy seperately so we can cache this step.
COPY package.json yarn.lock /app/
RUN yarn install

# Copy our app over now
COPY . /app

# And compile our assets
RUN rails assets:precompile && \
      rm -rf node_modules tmp log

FROM ruby:2.6.3-alpine

RUN apk add --update postgresql-dev tzdata && \
      cp /usr/share/zoneinfo/UTC /etc/localtime && \
      echo "UTC" > /etc/timezone

# Make an app directory, just like Heroku.
RUN mkdir /app
WORKDIR /app

# Grab everything from the builder
COPY --from=builder /usr/local/bundle/ /usr/local/bundle/
COPY --from=builder /app/ /app/

# Copy the docker configurations over
COPY config/database.yml.docker config/database.yml

# Run the server
EXPOSE 3000
CMD rails server -p 3000