Ruby publisher for RabbitMQ queue with bunny gem

publisher.rb

#!/usr/bin/env ruby
# encoding utf-8

require 'bunny'
require 'json'
STDOUT.sync = true

conn = Bunny.new(host: 'rmq', user: 'guest', pass: 'guest')
conn.start

ch = conn.create_channel
x = ch.exchange('work.exchange')

(1..10).each do |i|
  x.publish(
      {id: i, text: "I'm message #{i}"}.to_json,
      routing_key: 'work.queue',
      headers: {
        content_type: 'application/json'
      }
    )
end
conn.close