title: error: jquery.js is not found
body: <p>I wrote the next row in <code>index.html.erb</code>:</p>
  
  <pre><code>&lt;script src="/app/assets/javascripts/jquery.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>I added the file: <code>jquery.js</code> to the folder: <code>app/assets/javascripts</code></p>
  
  <p>but in the console, I got an error:</p>
  
  <pre><code>GET http://localhost:3000/app/assets/javascripts/jquery.js 404 (Not Found)
  </code></pre>
  
  <p>please help.</p>