I have spent the better part of the day trying to get images to load on my heroku app. Everything I try works locally, but not after being deployed to heroku.
I h
I had a similar issue and I solved it with the following line in the custom.css.scss.. Tell me if this works for you.
background: image-url('sf.png')
Referencing the asset being done different ways depending if you are using ERB or Sass, see in the Ruby on Rails Guide.