Revert new Dockerfile

Signed-off-by: Chang-Woo Rhee <x1wins@changwoo.net>

official-documentation-samples/rails/README.md

@@ -10,68 +10,22 @@ Docker container containing its dependencies. Defining dependencies is done usin
 a file called `Dockerfile`. To begin with, the  Dockerfile consists of:
 
 ```dockerfile
-# syntax = docker/dockerfile:1
-
-# Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
-ARG RUBY_VERSION=3.1.4
-FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim as base
-
-# Rails app lives here
-WORKDIR /rails
-
-# Set production environment
-#ENV RAILS_ENV="production" \
-#    BUNDLE_DEPLOYMENT="1" \
-#    BUNDLE_PATH="/usr/local/bundle" \
-#    BUNDLE_WITHOUT="development"
-
-
-# Throw-away build stage to reduce size of final image
-FROM base as build
-
-# Install packages needed to build gems
-RUN apt-get update -qq && \
-    apt-get install --no-install-recommends -y build-essential git libpq-dev libvips pkg-config
-
-# Install application gems
-COPY Gemfile Gemfile.lock ./
-RUN bundle install && \
-    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
-    bundle exec bootsnap precompile --gemfile
-
-# Copy application code
-COPY . .
-
-# Precompile bootsnap code for faster boot times
-RUN bundle exec bootsnap precompile app/ lib/
-
-# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
-RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
-
-
-# Final stage for app image
-FROM base
-
-# Install packages needed for deployment
-RUN apt-get update -qq && \
-    apt-get install --no-install-recommends -y curl libvips postgresql-client && \
-    rm -rf /var/lib/apt/lists /var/cache/apt/archives
-
-# Copy built artifacts: gems, application
-COPY --from=build /usr/local/bundle /usr/local/bundle
-COPY --from=build /rails /rails
-
-# Run and own only the runtime files as a non-root user for security
-RUN useradd rails --create-home --shell /bin/bash && \
-    chown -R rails:rails db log storage tmp
-USER rails:rails
-
-# Entrypoint prepares the database.
-ENTRYPOINT ["/rails/bin/docker-entrypoint"]
-
-# Start the server by default, this can be overwritten at runtime
+# syntax=docker/dockerfile:1
+FROM ruby:3.1
+RUN apt-get update -qq && apt-get install -y nodejs postgresql-client
+WORKDIR /myapp
+COPY Gemfile /myapp/Gemfile
+COPY Gemfile.lock /myapp/Gemfile.lock
+RUN bundle install
+
+# Add a script to be executed every time the container starts.
+COPY entrypoint.sh /usr/bin/
+RUN chmod +x /usr/bin/entrypoint.sh
+ENTRYPOINT ["entrypoint.sh"]
 EXPOSE 3000
-CMD ["./bin/rails", "server"]
+
+# Configure the main process to run when running the image
+CMD ["rails", "server", "-b", "0.0.0.0"]
 ```
 
 That'll put your application code inside an image that builds a container