[RUBY] [Rails] We have summarized the storage locations and usage of developer and user images.

Image storage location

Use of the file to save	Storage location
Files prepared by the developer	app/assets/under images
File uploaded by the user	Under public

When you want to call an image from HTML

`html.erb`



# app/assets/images/logo.For png
<%= image_tag 'logo.png' %>

<img src="/assets/logo.png " alt="" >

`html.erb`


# public/logo.For png
<%= image_tag '/logo.png' %>

When you want to call an image from Sass

`python`



// app/assets/images/logo.For png
h1 {
  background-image: image-url('logo.png')
}

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