部署你的应用程序
确保你位于包含 Rails 应用程序的目录中，然后在 Heroku 上创建一个应用程序。
$ heroku create example
Creating ⬢ example... done
https://example.herokuapp.com/ | https://git.heroku.com/example.git
输出的第一个 URL http://example.herokuapp.com 是应用程序可用的位置。第二个 URL git@heroku.com:example.git 是远程 git 存储库 URL。
此命令应仅用于初始化的 git 存储库。heroku create 命令会自动添加一个名为 heroku 的 git 远程指向此 URL。
应用程序名称参数（示例）是可选的。如果未指定应用程序名称，则将生成随机名称。由于 Heroku 应用程序名称位于全局命名空间中，因此你可以预期会使用常用名称，例如 blog 或 wiki。使用默认名称并稍后重命名应用程序通常更容易。
接下来，部署你的代码：
$ git push heroku master
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Ruby app detected
remote: -----> Compiling Ruby/Rails
remote: -----> Using Ruby version: ruby-2.3.1
remote: -----> Installing dependencies using bundler 1.11.2
remote: Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
remote: Warning: the running version of Bundler is older than the version that created the lockfile. We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: Fetching gem metadata from https://rubygems.org/..........
remote: Fetching version metadata from https://rubygems.org/...
remote: Fetching dependency metadata from https://rubygems.org/..
remote: Installing concurrent-ruby 1.0.2
remote: Installing i18n 0.7.0
remote: Installing rake 11.2.2
remote: Installing minitest 5.9.0
remote: Installing thread_safe 0.3.5
remote: Installing builder 3.2.2
remote: Installing mini_portile2 2.1.0
remote: Installing erubis 2.7.0
remote: Installing pkg-config 1.1.7
remote: Installing rack 2.0.1
remote: Installing nio4r 1.2.1 with native extensions
remote: Installing websocket-extensions 0.1.2
remote: Installing mime-types-data 3.2016.0521
remote: Installing arel 7.0.0
remote: Installing coffee-script-source 1.10.0
remote: Installing execjs 2.7.0
remote: Installing method_source 0.8.2
remote: Installing thor 0.19.1
remote: Installing multi_json 1.12.1
remote: Installing puma 3.4.0 with native extensions
remote: Installing pg 0.18.4 with native extensions
remote: Using bundler 1.11.2
remote: Installing sass 3.4.22
remote: Installing tilt 2.0.5
remote: Installing turbolinks-source 5.0.0
remote: Installing tzinfo 1.2.2
remote: Installing nokogiri 1.6.8 with native extensions
remote: Installing rack-test 0.6.3
remote: Installing sprockets 3.6.3
remote: Installing websocket-driver 0.6.4 with native extensions
remote: Installing mime-types 3.1
remote: Installing coffee-script 2.4.1
remote: Installing uglifier 3.0.0
remote: Installing turbolinks 5.0.0
remote: Installing activesupport 5.0.0
remote: Installing mail 2.6.4
remote: Installing globalid 0.3.6
remote: Installing activemodel 5.0.0
remote: Installing jbuilder 2.5.0
remote: Installing activejob 5.0.0
remote: Installing activerecord 5.0.0
remote: Installing loofah 2.0.3
remote: Installing rails-dom-testing 2.0.1
remote: Installing rails-html-sanitizer 1.0.3
remote: Installing actionview 5.0.0
remote: Installing actionpack 5.0.0
remote: Installing actionmailer 5.0.0
remote: Installing railties 5.0.0
remote: Installing actioncable 5.0.0
remote: Installing sprockets-rails 3.1.1
remote: Installing coffee-rails 4.2.1
remote: Installing jquery-rails 4.1.1
remote: Installing rails 5.0.0
remote: Installing sass-rails 5.0.5
remote: Bundle complete! 15 Gemfile dependencies, 54 gems now installed.
remote: Gems in the groups development and test were not installed.
remote: Bundled gems are installed into ./vendor/bundle.
remote: Bundle completed (31.86s)
remote: Cleaning up the bundler cache.
remote: Warning: the running version of Bundler is older than the version that created the lockfile. We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: -----> Preparing app for Rails asset pipeline
remote: Running: rake assets:precompile
remote: I, [2016-07-08T17:08:57.046245 #1222] INFO -- : Writing /tmp/build_49ba6c877f5502cd4029406e981f90b4/public/assets/application-1bf5315c71171ad5f9cbef00193d56b7e45263ddc64caf676ce988cfbb6570bd.js
remote: I, [2016-07-08T17:08:57.046951 #1222] INFO -- : Writing /tmp/build_49ba6c877f5502cd4029406e981f90b4/public/assets/application-1bf5315c71171ad5f9cbef00193d56b7e45263ddc64caf676ce988cfbb6570bd.js.gz
remote: I, [2016-07-08T17:08:57.060208 #1222] INFO -- : Writing /tmp/build_49ba6c877f5502cd4029406e981f90b4/public/assets/application-e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855.css
remote: I, [2016-07-08T17:08:57.060656 #1222] INFO -- : Writing /tmp/build_49ba6c877f5502cd4029406e981f90b4/public/assets/application-e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855.css.gz
remote: Asset precompilation completed (4.06s)
remote: Cleaning assets
remote: Running: rake assets:clean
remote:
remote: ###### WARNING:
remote: No Procfile detected, using the default web server.
remote: We recommend explicitly declaring how to boot your server process via a Procfile.
remote: https://devcenter.heroku.com/articles/ruby-default-web-server
remote:
remote: -----> Discovering process types
remote: Procfile declares types -> (none)
remote: Default types for buildpack -> console, rake, web, worker
remote:
remote: -----> Compressing...
remote: Done: 29.2M
remote: -----> Launching...
remote: Released v5
remote: https://example.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy... done.
To https://git.heroku.com/example.git
* [new branch] master -> master
如果你在应用程序中使用数据库，则需要通过运行以下命令手动迁移数据库：
$ heroku run rake db:migrate
heroku run 之后的任何命令都将在 Heroku dyno 上执行。你可以通过运行以下命令获取交互式 shell 会话：
$ heroku run bash
确保你有一个运行 Web 进程类型的 dyno：
$ heroku ps:scale web=1
heroku ps 命令列出了应用程序的运行 dynos：
$ heroku ps
=== web (Standard-1X): bin/rails server -p $PORT -e $RAILS_ENV (1)
web.1: starting 2016/07/08 12:09:06 -0500 (~ 2s ago)
你现在可以使用 heroku open 在我们的浏览器中访问该应用程序。
$ heroku open
Heroku 为你提供 herokuapp.com 域中的默认 Web URL。准备好进行扩展以进行生产时，可以添加自己的自定义域。