Rails 7.0.1/Ruby 3.1/SQLite app in Docker

rails_docker.sh

# set ruby/rails version
export DOCKER_RAILS_VERSION="7.0.1"
export DOCKER_RUBY_VERSION="3.1.0"
export RAILS_PROJECT_NAME="rails7"
# create folder for the project and add Gemfile with necessary rails version
mkdir "$RAILS_PROJECT_NAME"
cd "$RAILS_PROJECT_NAME"
echo "ruby '$DOCKER_RUBY_VERSION'
source 'https://rubygems.org'
gem 'rails', '$DOCKER_RAILS_VERSION'" > Gemfile
# create folder for Docker configuration
mkdir .devcontainer
cd .devcontainer
# create Dockerfile
echo "FROM ruby:$DOCKER_RUBY_VERSION-slim
# install required dependencies
RUN apt-get update \
 && apt-get install -y make gcc git sqlite3 libsqlite3-dev \
 && rm -rf /var/lib/apt/lists/*" > Dockerfile
# create configuration for docker-compose
echo "services:                    
  # name of the service
  web:
    image: ruby-$DOCKER_RUBY_VERSION-rails-$DOCKER_RAILS_VERSION
    build:                                                                                                                 
      context: .       
      # use Dockerfile for build
      dockerfile: Dockerfile                                                                                               
    volumes:
      # mount parent directory as /web with cahed configuration for speedup 
      - "$(pwd)/..":/web:cached                                            
    # set mounted directory as default
    working_dir: /web                                                                                                     
    command: sleep infinity
    environment:
      # install gems to the folder with project files
      - BUNDLE_PATH=vendor/bundle
    ports:
      # expose port 3000 to the outer world
      - '3000:3000'" > docker-compose.yml
# build container
docker-compose up -d --build
# install rails
docker-compose exec web bundle
# generate new rails project
docker-compose exec web bundle exec rails new . -f
# start rails server at IP 0.0.0.0 so that it's available on the host macOS
docker-compose exec web bundle exec rails s -b 0.0.0.0

Thanks

Thanks a lot!