fix image display issue

[danielstanojevic]

product images (starter frontend homepage) don't display properly because the size property isn't correct. before: after:

Should have corresponding size in config->initializers->spree.rb or use solidus default size For example:

Spree.config do |config|
  # ...
  config.product_image_styles = {
    mini: "48x48>",
    small: "400x400>",
    big: "680x680>",
    product: "680x680>",
    large: "1200x1200>",
    full: "1600x1600>",
    jumbo: "1600x1600>"
  }
end

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[danielstanojevic]

rspec passed locally:

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.99%. Comparing base (f9950a4) to head (b40cf05).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #369 +/- ## ======================================= Coverage 95.99% 95.99% ======================================= Files 207 207 Lines 4874 4874 ======================================= Hits 4679 4679 Misses 195 195 ```

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