rails デプロイ　エラーについて

前提・実現したいこと

herokuにrailsで作成したappをあげるため、git push Heroku後、heroku pg:reset DATABASE、heroku run:detached rails db:migrate、そしてheroku run:detached rails db:seedをした後、heroku openをしたところapplication errorが出てしまいます。対処法を教えてください。

発生している問題・エラーメッセージ

Heroku logの結果を以下に示します。（エラー箇所のみ）

2020-03-16T05:12:07.046950+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=ancient-scrubland-55684.herokuapp.com request_id=f210e631-ce71-42a6-8192-3629233a0d50 fwd="133.35.37.111" dyno= connect= service= status=503 bytes= protocol=https

heroku heroku run rails cをすると以下のようになります。

Traceback (most recent call last):
	47: from /app/bin/rails:9:in `<main>'
	46: from /app/bin/rails:9:in `require'
	45: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/commands.rb:16:in `<top (required)>'
	44: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/command.rb:44:in `invoke'
	43: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/command/base.rb:63:in `perform'
	42: from /app/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
	41: from /app/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
	40: from /app/vendor/bundle/ruby/2.6.0/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
	39: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/commands/console/console_command.rb:96:in `perform'
	38: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/command/actions.rb:16:in `require_application_and_environment!'
	37: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/application.rb:329:in `require_environment!'
	36: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/application.rb:329:in `require'
	35: from /app/config/environment.rb:5:in `<top (required)>'
	34: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/application.rb:353:in `initialize!'
	33: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/initializable.rb:58:in `run_initializers'
	32: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:205:in `tsort_each'
	31: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:226:in `tsort_each'
	30: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:347:in `each_strongly_connected_component'
	29: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:347:in `call'
	28: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:347:in `each'
	27: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:349:in `block in each_strongly_connected_component'
	26: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:431:in `each_strongly_connected_component_from'
	25: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
	24: from /app/vendor/ruby-2.6.5/lib/ruby/2.6.0/tsort.rb:228:in `block in tsort_each'
	23: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/initializable.rb:59:in `block in run_initializers'
	22: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/initializable.rb:30:in `run'
	21: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/initializable.rb:30:in `instance_exec'
	20: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/application/finisher.rb:67:in `block in <module:Finisher>'
	19: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/application/finisher.rb:67:in `each'
	18: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/engine.rb:354:in `eager_load!'
	17: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/engine.rb:473:in `eager_load!'
	16: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/engine.rb:473:in `each'
	15: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/engine.rb:475:in `block in eager_load!'
	14: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/engine.rb:475:in `each'
	13: from /app/vendor/bundle/ruby/2.6.0/gems/railties-5.1.6/lib/rails/engine.rb:476:in `block (2 levels) in eager_load!'
	12: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-5.1.6/lib/active_support/dependencies/interlock.rb:11:in `loading'
	11: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-5.1.6/lib/active_support/concurrency/share_lock.rb:149:in `exclusive'
	10: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-5.1.6/lib/active_support/dependencies/interlock.rb:12:in `block in loading'
	 9: from /app/app/models/micropost.rb:1:in `<top (required)>'
	 8: from /app/app/models/micropost.rb:4:in `<class:Micropost>'
	 7: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-5.1.6/lib/active_support/dependencies/interlock.rb:11:in `loading'
	 6: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-5.1.6/lib/active_support/concurrency/share_lock.rb:149:in `exclusive'
	 5: from /app/vendor/bundle/ruby/2.6.0/gems/activesupport-5.1.6/lib/active_support/dependencies/interlock.rb:12:in `block in loading'
	 4: from /app/app/uploaders/picture_uploader.rb:1:in `<top (required)>'
	 3: from /app/app/uploaders/picture_uploader.rb:6:in `<class:PictureUploader>'
	 2: from /app/vendor/bundle/ruby/2.6.0/gems/carrierwave-1.2.2/lib/carrierwave/uploader/configuration.rb:78:in `storage'
	 1: from /app/vendor/bundle/ruby/2.6.0/gems/carrierwave-1.2.2/lib/carrierwave/uploader/configuration.rb:78:in `eval'
(eval):1:in `storage': uninitialized constant CarrierWave::Storage::Fog (NameError)

該当のソースコード

CarrierWaveに関係しているファイルを以下に全て貼ります

source 'https://rubygems.org'

gem 'rails',        '5.1.6'
gem 'rinku'
gem 'bcrypt',         '3.1.12'
gem 'faker',          '1.7.3'
gem 'carrierwave',             '1.2.2'
gem 'mini_magick',             '4.7.0'
gem 'will_paginate',           '3.1.6'
gem 'bootstrap-will_paginate', '1.0.0'
gem 'puma',         '3.9.1'
gem 'sass-rails',   '5.0.6'
gem 'uglifier',     '3.2.0'
gem 'coffee-rails', '4.2.2'
gem 'jquery-rails', '4.3.1'
gem 'jquery-ui-rails'
gem 'turbolinks',   '5.0.1'
gem 'jbuilder',     '2.7.0'

group :development, :test do
  gem 'sqlite3', '1.3.13'
  gem 'byebug',  '9.0.6', platform: :mri
end

group :development do
  gem 'web-console',           '3.5.1'
  gem 'listen',                '3.1.5'
  gem 'spring',                '2.0.2'
  gem 'spring-watcher-listen', '2.0.1'
end

group :test do
  gem 'rails-controller-testing', '1.0.2'
  gem 'minitest',                 '5.10.3'
  gem 'minitest-reporters',       '1.1.14'
  gem 'guard',                    '2.13.0'
  gem 'guard-minitest',           '2.4.4'
end

group :production do
  gem 'pg', '< 1.0.0'
  gem 'fog', '1.42'
end

# Windows環境ではtzinfo-dataというgemを含める必要があります
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

class PictureUploader < CarrierWave::Uploader::Base
  include CarrierWave::MiniMagick
  process resize_to_limit: [200, 200]

  if Rails.env.production?
    storage :fog
  else
    storage :file
  end


  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end


  def extension_whitelist
     %w(jpg jpeg gif png)
  end

  
end

if Rails.env.production?
  CarrierWave.configure do |config|
    config.fog_credentials = {
      # Amazon S3用の設定
      :provider              => 'AWS',
      :region                => ENV['S3_REGION'],     # 例: 'ap-northeast-1'
      :aws_access_key_id     => ENV['S3_ACCESS_KEY'],
      :aws_secret_access_key => ENV['S3_SECRET_KEY']
    }
    config.fog_directory     =  ENV['S3_BUCKET']
  end
end