Build Docker Image
source 'https://rubygems.org'
gem 'sinatra'require 'sinatra'
require 'socket'
get '/' do
Socket.gethostname
endFROM ruby:2.3
MAINTAINER dominic2009@snu.ac.kr
COPY Gemfile* /usr/src/app/
WORKDIR /usr/src/app
RUN bundle install
COPY . /usr/src/app
EXPOSE 4567
CMD bundle exec ruby app.rb -o 0.0.0.0
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