ruby-3.1.0/rails-7.0.1/Potgress app with dv and test database inside Docker

docker-compose.sh

# set ruby/rails version
export DOCKER_RAILS_VERSION="7.0.1"
export DOCKER_RUBY_VERSION="3.1.0"
export RAILS_PROJECT_NAME="rails-7-app-inside-docker-on-osx-part-2"
# 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 for app
echo "FROM ruby:$DOCKER_RUBY_VERSION-slim
# install required dependencies
RUN apt-get update \
 && apt-get install -y make gcc git build-essential libpq-dev \
 && rm -rf /var/lib/apt/lists/*" > Dockerfile
# create configuration for mutagen-compose
echo "version: '3.8'
volumes:
  web:
services:
  # name of the service
  web:
    image: ruby-$DOCKER_RUBY_VERSION-rails-$DOCKER_RAILS_VERSION
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - web:/web
    # set mounted directory as default
    working_dir: /web
    command: sleep infinity
    environment:
      - BUNDLE_PATH=vendor/bundle
    ports:
      - 3000:3000
  web_development:
    image: postgres:14
    environment:
      - LC_ALL=C.UTF-8
      - POSTGRES_DB=web_development
      - POSTGRES_USER=web_development
      - POSTGRES_HOST_AUTH_METHOD=trust
    ports:
      - 54321:5432
  web_test:
    image: postgres:14
    environment:
      - LC_ALL=C.UTF-8
      - POSTGRES_DB=web_test
      - POSTGRES_USER=web_test
      - POSTGRES_HOST_AUTH_METHOD=trust
    ports:
      - 54322:5432
# Set up Mutagen synchronization
# https://github.com/mutagen-io/mutagen-examples/blob/main/compose/web-go/compose.yml
x-mutagen:
  sync:
    defaults:
      ignore:
        vcs: true
    web:
      alpha: '..'
      beta: 'volume://web'
      mode: 'two-way-resolved'"> compose.yml
mutagen-compose up -d --build
mutagen-compose exec web bundle
mutagen-compose exec web bundle exec rails new . -f --database=postgresql
# use proper hosts for the database
# connect to web_development instead of localhost in development
mutagen-compose exec web sed -i 's/#host: localhost/host: web_development/' config/database.yml
# use web_development user instead of root in development for connection
mutagen-compose exec web sed -i 's/#username: web/username: web_development/' config/database.yml
# same here - use proper username and hosthane
mutagen-compose exec web sed -i '/database: web_test/i \
  username: web_test\
  host: web_test' config/database.yml
mutagen-compose exec web bundle exec rails s -b 0.0.0.0