pokemon.trade/Dockerfile

FROM ruby:2.6.3-alpine AS base

ARG BUILD_PACKAGES="build-base git"
ARG DEV_PACKAGES="postgresql-dev yarn"
ARG RUBY_PACKAGES="tzdata"

RUN apk update && \
      apk add --no-cache $BUILD_PACKAGES $DEV_PACKAGES $RUBY_PACKAGES

RUN mkdir /app
WORKDIR /app

################################################################################
FROM base AS builder

# 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

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

# Copy our app over now
COPY bin/ /app/bin
COPY .rspec Rakefile /app/
COPY vendor/ /app/vendor
COPY config.ru /app/config.ru
COPY config/ /app/config
COPY config/database.yml.docker /app/config/database.yml
COPY public/ /app/public
COPY db/ /app/db
COPY app/assets/ /app/app/assets
COPY app/javascript/ /app/app/javascript
COPY lib/ /app/lib

# Compile our assets, moving unneeded directories out of way for the prod image
# after compilation has completed.
RUN rails assets:precompile --trace && \
      rm -rf tmp/cache log && \
      mkdir -p /var/cache/app/app && \
      mv node_modules /var/cache/app && \
      mv app/assets /var/cache/app/app && \
      mv app/javascript /var/cache/app/app

################################################################################
FROM base AS dev

COPY --from=builder /usr/local/bundle/ /usr/local/bundle/
COPY --from=builder /app/ /app/
COPY --from=builder /var/cache/app/ /app/

COPY app/ /app/app
COPY spec /app/spec

################################################################################
FROM base AS prod

ENV RAILS_ENV=production

# Install only required gems for production, and remove any uneccesary build
# packages
RUN bundle install --jobs 4 --retry 5 --without development test && \
      apk rm $BUILD_PACKAGES $DEV_PACKAGES

COPY bin/ /app/bin
COPY .rspec .ruby-version Rakefile /app/
COPY vendor/ /app/vendor
COPY config.ru /app/config.ru
COPY config/ /app/config
COPY config/database.yml.docker /app/config/database.yml
COPY public/ /app/public
COPY db/ /app/db
COPY lib/ /app/lib
COPY app/ /app/app

COPY --from=builder public/ /app/public

# Run the server
EXPOSE 3000
CMD ["rails", "server", "-b", "0.0.0.0"]