rails tutorials 第8章　リスト8.20 application.jsにBootstrapのJavaScriptライブラリを追加する

エラーの解決方法をご教授いただけると幸いです。

/home/ec2-user/environment/sample_app/app/views/layouts/application.html.erb where line #7 raised:

rails server 上では、以下のエラーが表示されます。

ActionView::Template::Error (couldn't find file 'jquery' with type 'application/javascript'
Checked in these paths:
/home/ec2-user/environment/sample_app/app/assets/config
/home/ec2-user/environment/sample_app/app/assets/images
/home/ec2-user/environment/sample_app/app/assets/javascripts
/home/ec2-user/environment/sample_app/app/assets/stylesheets
/usr/local/rvm/gems/ruby-2.4.1/gems/coffee-rails-4.2.2/lib/assets/javascripts
/usr/local/rvm/gems/ruby-2.4.1/gems/actioncable-5.1.6/lib/assets/compiled
/usr/local/rvm/gems/ruby-2.4.1/gems/actionview-5.1.6/lib/assets/compiled
/usr/local/rvm/gems/ruby-2.4.1/gems/turbolinks-source-5.2.0/lib/assets/javascripts
/home/ec2-user/environment/sample_app/node_modules
/usr/local/rvm/gems/ruby-2.4.1/gems/bootstrap-sass-3.3.7/assets/stylesheets
/usr/local/rvm/gems/ruby-2.4.1/gems/bootstrap-sass-3.3.7/assets/javascripts
/usr/local/rvm/gems/ruby-2.4.1/gems/bootstrap-sass-3.3.7/assets/fonts
/usr/local/rvm/gems/ruby-2.4.1/gems/bootstrap-sass-3.3.7/assets/images):
10: <%= link_to "Sign up now!", signup_path, class: "btn btn-lg btn-primary" %>
11: </div>
12:
13: <%= link_to image_tag("rails.png", alt: "Rails logo"),
14: 'http://rubyonrails.org/' %>

app/assets/javascripts/application.js:14
app/views/static_pages/home.html.erb:13:in `_app_views_static_pages_home_html_erb__3699283268734199705_70055758796440'