A quick and dirty sinatra project docker demo

sinatra-docker.sh

#!/bin/bash
# A quick and dirty sinatra project docker demo

mkdir projects
cd projects
gem install hazel
hazel my_app
cd my_app
bundle pack
bundle install --path vendor/bundle --local

# Docker!
cat <<DOCKERFILE > Dockerfile
FROM ruby:2.2.0-onbuild
CMD bundle exec rackup -p 3000 -o 0.0.0.0 config.ru
DOCKERFILE

docker build -t my_app .

docker run -d -p 3000:3000 my_app

echo Open a browser to: http://$(echo $DOCKER_HOST | cut -d/ -f3 | cut -d: -f1):3000