DockerでRailsチュートリアルの環境構築

FROM ruby:2.5.5
RUN apt-get update -qq && apt-get install -y nodejs mysql-client
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
COPY . /myapp

# 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

# Start the main process.
CMD ["rails", "server", "-b", "0.0.0.0"]

version: '3'
services:
mysql:
image: mysql:8.0.16
command: --default-authentication-plugin=mysql_native_password
volumes:
- ./mysql-data:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: root
web:
build: .
command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
volumes:
- .:/myapp
ports:
- "3001:3000"
depends_on:
- mysql
tty: true

#!/bin/bash
set -e

# Remove a potentially pre-existing server.pid for Rails.
rm -f /myapp/tmp/pids/server.pid

# Then exec the container's main process (what's set as CMD in the Dockerfile).
exec "$@"

source 'https://rubygems.org'
gem 'rails', '5.1.6'