I wanted to design it a little fashionably, so I tried using the icon. Font Awesome There are many icons that you can use for free. It can also be used with Rails.
Add to the bottom of the file.
At the terminal
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.9.0/css/all.css">
Describe in the
Select the icon you want to use from Official Site and select it.
<i class="fa fa-Icon name"></i>
It can also be used with helper methods.