Rails4のアプリをHerokuで動かす ref: http://qiita.com/gam0022/items/e9e0fe3e195035873462

database.yml

  timeout: 5000

production:
-  adapter: sqlite3
-  database: db/production.sqlite3
+  adapter: pg
+  database: db/production.pg

file2.txt

       Gem files will remain installed in /tmp/build_8njhwta846es/vendor/bundle/ruby/2.0.0/gems/sqlite3-1.3.8 for inspection.
       Results logged to /tmp/build_8njhwta846es/vendor/bundle/ruby/2.0.0/gems/sqlite3-1.3.8/ext/sqlite3/gem_make.out
       An error occurred while installing sqlite3 (1.3.8), and Bundler cannot continue.
       Make sure that `gem install sqlite3 -v '1.3.8'` succeeds before bundling.
 !
 !     Failed to install gems via Bundler.
 !
 !     Detected sqlite3 gem which is not supported on Heroku.
 !     https://devcenter.heroku.com/articles/sqlite3
 !

 !     Push rejected, failed to compile Ruby/Rails app

To git@heroku.com:pacific-waters-7608.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:pacific-waters-7608.git'

file3.txt

git init
git add .
git commit -m "first commit"

file4.txt

heroku create # このとき、`heroku create アプリ名` で、任意のアプリ名にもできる。
git push heroku # Heroku への deploy は git の commit で行うよう。時間がかかる。
heroku open # ブラウザで確認できる。

file5.txt

git push heroku

 !  No such app as pacific-waters-7608.

fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

file6.txt

heroku run rake db:migrate

Gemfile

gem 'rails', '4.0.0'

# Use sqlite3 as the database for Active Record
-gem 'sqlite3'
+gem 'sqlite3', groups: %w(test development), require: false
+gem 'pg', groups: %w(production), require: false

# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.0'

production.rb

   # config.action_dispatch.rack_cache = true

   # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_assets = false
+  config.serve_static_assets = true

   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier