Add the image to the theme
Go to Sales Channels > Online Store > Themes
Find your theme
Click "Edit code"
Expand the assets folder of your theme
In your file explorer, find your image
Drag and drop your image from your file explorer into the assets folder
Select the image
In Discount Ninja:
Edit the Sticky bar or Notification block.
In the Image section, select the "Show image" checkbox.
Click the "Select image from assets" option
