Hello World

.dockerignore

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+# See https://docs.docker.com/engine/reference/builder/#dockerignore-file for more about ignoring files.
+
+# Ignore git directory.
+/.git/
+/.gitignore
+
+# Ignore bundler config.
+/.bundle
+
+# Ignore all environment files (except templates).
+/.env*
+!/.env*.erb
+
+# Ignore all default key files.
+/config/master.key
+/config/credentials/*.key
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# Ignore pidfiles, but keep the directory.
+/tmp/pids/*
+!/tmp/pids/.keep
+
+# Ignore storage (uploaded files in development and any SQLite databases).
+/storage/*
+!/storage/.keep
+/tmp/storage/*
+!/tmp/storage/.keep
+
+# Ignore assets.
+/node_modules/
+/app/assets/builds/*
+!/app/assets/builds/.keep
+/public/assets
+
+# Ignore CI service files.
+/.github
+
+# Ignore development files
+/.devcontainer
+
+# Ignore Docker-related files
+/.dockerignore
+/Dockerfile*

.gitattributes

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+# See https://git-scm.com/docs/gitattributes for more about git attribute files.
+
+# Mark the database schema as having been generated.
+db/schema.rb linguist-generated
+
+# Mark any vendored files as having been vendored.
+vendor/* linguist-vendored
+config/credentials/*.yml.enc diff=rails_credentials
+config/credentials.yml.enc diff=rails_credentials

.github/dependabot.yml

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+version: 2
+updates:
+- package-ecosystem: bundler
+ directory: "/"
+ schedule:
+ interval: daily
+ open-pull-requests-limit: 10
+- package-ecosystem: github-actions
+ directory: "/"
+ schedule:
+ interval: daily
+ open-pull-requests-limit: 10

.github/workflows/ci.yml

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+name: CI
+
+on:
+ pull_request:
+ push:
+ branches: [ main ]
+
+jobs:
+ scan_ruby:
+ runs-on: ubuntu-latest
+
+ steps:
+ - name: Checkout code
+ uses: actions/checkout@v4
+
+ - name: Set up Ruby
+ uses: ruby/setup-ruby@v1
+ with:
+ ruby-version: .ruby-version
+ bundler-cache: true
+
+ - name: Scan for common Rails security vulnerabilities using static analysis
+ run: bin/brakeman --no-pager
+
+ scan_js:
+ runs-on: ubuntu-latest
+
+ steps:
+ - name: Checkout code
+ uses: actions/checkout@v4
+
+ - name: Set up Ruby
+ uses: ruby/setup-ruby@v1
+ with:
+ ruby-version: .ruby-version
+ bundler-cache: true
+
+ - name: Scan for security vulnerabilities in JavaScript dependencies
+ run: bin/importmap audit
+
+ lint:
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout code
+ uses: actions/checkout@v4
+
+ - name: Set up Ruby
+ uses: ruby/setup-ruby@v1
+ with:
+ ruby-version: .ruby-version
+ bundler-cache: true
+
+ - name: Lint code for consistent style
+ run: bin/rubocop -f github
+
+ test:
+ runs-on: ubuntu-latest
+
+ # services:
+ # redis:
+ # image: redis
+ # ports:
+ # - 6379:6379
+ # options: --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5
+ steps:
+ - name: Install packages
+ run: sudo apt-get update && sudo apt-get install --no-install-recommends -y google-chrome-stable curl libjemalloc2 libvips sqlite3
+
+ - name: Checkout code
+ uses: actions/checkout@v4
+
+ - name: Set up Ruby
+ uses: ruby/setup-ruby@v1
+ with:
+ ruby-version: .ruby-version
+ bundler-cache: true
+
+ - name: Run tests
+ env:
+ RAILS_ENV: test
+ # REDIS_URL: redis://localhost:6379/0
+ run: bin/rails db:test:prepare test test:system
+
+ - name: Keep screenshots from failed system tests
+ uses: actions/upload-artifact@v4
+ if: failure()
+ with:
+ name: screenshots
+ path: ${{ github.workspace }}/tmp/screenshots
+ if-no-files-found: ignore

.gitignore

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+# See https://help.github.com/articles/ignoring-files for more about ignoring files.
+#
+# Temporary files generated by your text editor or operating system
+# belong in git's global ignore instead:
+# `$XDG_CONFIG_HOME/git/ignore` or `~/.config/git/ignore`
+
+# Ignore bundler config.
+/.bundle
+
+# Ignore all environment files (except templates).
+/.env*
+!/.env*.erb
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# Ignore pidfiles, but keep the directory.
+/tmp/pids/*
+!/tmp/pids/
+!/tmp/pids/.keep
+
+# Ignore storage (uploaded files in development and any SQLite databases).
+/storage/*
+!/storage/.keep
+/tmp/storage/*
+!/tmp/storage/
+!/tmp/storage/.keep
+
+/public/assets
+
+# Ignore master key for decrypting credentials and more.
+/config/master.key
+
+/config/credentials/production.key

.rubocop.yml

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+# Omakase Ruby styling for Rails
+inherit_gem: { rubocop-rails-omakase: rubocop.yml }
+
+# Overwrite or add rules to create your own house style
+#
+# # Use `[a, [b, c]]` not `[ a, [ b, c ] ]`
+# Layout/SpaceInsideArrayLiteralBrackets:
+# Enabled: false

.ruby-version

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+3.3.5

Dockerfile

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+# syntax = docker/dockerfile:1
+
+# This Dockerfile is designed for production, not development. Use with Kamal or build'n'run by hand:
+# docker build -t my-app .
+# docker run -d -p 80:80 -p 443:443 --name my-app -e RAILS_MASTER_KEY=<value from config/master.key> my-app
+
+# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
+ARG RUBY_VERSION=3.3.5
+FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
+
+# Rails app lives here
+WORKDIR /rails
+
+# Install base packages
+RUN apt-get update -qq && \
+ apt-get install --no-install-recommends -y curl libjemalloc2 libvips sqlite3 && \
+ rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+# Set production environment
+ENV RAILS_ENV="production" \
+ BUNDLE_DEPLOYMENT="1" \
+ BUNDLE_PATH="/usr/local/bundle" \
+ BUNDLE_WITHOUT="development"
+
+# Throw-away build stage to reduce size of final image
+FROM base AS build
+
+# Install packages needed to build gems
+RUN apt-get update -qq && \
+ apt-get install --no-install-recommends -y build-essential git pkg-config && \
+ rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+# Install application gems
+COPY Gemfile Gemfile.lock ./
+RUN bundle install && \
+ rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
+ bundle exec bootsnap precompile --gemfile
+
+# Copy application code
+COPY . .
+
+# Precompile bootsnap code for faster boot times
+RUN bundle exec bootsnap precompile app/ lib/
+
+# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
+RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
+
+
+
+
+# Final stage for app image
+FROM base
+
+# Copy built artifacts: gems, application
+COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
+COPY --from=build /rails /rails
+
+# Run and own only the runtime files as a non-root user for security
+RUN groupadd --system --gid 1000 rails && \
+ useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash && \
+ chown -R rails:rails db log storage tmp
+USER 1000:1000
+
+# Entrypoint prepares the database.
+ENTRYPOINT ["/rails/bin/docker-entrypoint"]
+
+# Start the server by default, this can be overwritten at runtime
+EXPOSE 3000
+CMD ["./bin/rails", "server"]

Gemfile

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+source "https://rubygems.org"
+ruby "~> 3.3.0"
+
+# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
+gem "rails", "~> 7.2.1"
+# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
+gem "sprockets-rails"
+# Use sqlite3 as the database for Active Record
+gem "sqlite3", ">= 1.4"
+# Use the Puma web server [https://github.com/puma/puma]
+gem "puma", ">= 5.0"
+# Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
+gem "importmap-rails"
+# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
+gem "turbo-rails"
+# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
+gem "stimulus-rails"
+# Build JSON APIs with ease [https://github.com/rails/jbuilder]
+gem "jbuilder"
+# Use Redis adapter to run Action Cable in production
+# gem "redis", ">= 4.0.1"
+
+# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
+# gem "kredis"
+
+# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
+# gem "bcrypt", "~> 3.1.7"
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem "tzinfo-data", platforms: %i[ windows jruby ]
+
+# Reduces boot times through caching; required in config/boot.rb
+gem "bootsnap", require: false
+
+# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
+# gem "image_processing", "~> 1.2"
+
+group :development, :test do
+ # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
+ gem "debug", platforms: %i[ mri windows ], require: "debug/prelude"
+
+ # Static analysis for security vulnerabilities [https://brakemanscanner.org/]
+ gem "brakeman", require: false
+
+ # Omakase Ruby styling [https://github.com/rails/rubocop-rails-omakase/]
+ gem "rubocop-rails-omakase", require: false
+end
+
+group :development do
+ # Use console on exceptions pages [https://github.com/rails/web-console]
+ gem "web-console"
+end
+
+group :test do
+ # Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
+ gem "capybara"
+ gem "selenium-webdriver"
+end