stripe ctf level 3 loves ruby

build.sh

#!/bin/sh

set -e

# Add or modify any build steps you need here
cd "$(dirname "$0")"

ruby --version

mkdir -p ./gems
gem install bundler --install-dir=./gems
export GEM_HOME=./gems
./gems/bin/bundler install
ruby test.rb

start-server.sh

#!/bin/sh

set -eu
set -x
if `which bundle`;
then
  ruby app.rb $@
else
  GEM_HOME=./gems ruby app.rb $@
fi

test.rb

require "rubygems"
require "bundler/setup"
require "sinatra/base"

STDERR.puts "ALL GOOD YO"