Custom OmniAuth Providers Images Not Loading

Created by: tdm00

I've successfully created my first OmniAuth strategy for use here at our university with the new OAuth provider we've created and packaged it as a gem. I added this to the Gemfile in GitLab and ran bundle install --path vendor/bundle --no-deployment, which installed the gem. I updated the gitlab.yml file by duplicating the section we have for GitHub and completing it with our own values. I then added two graphic files to the vendor/assets/images/authbuttons directory, all lowercase in the format of strategyname_32.png and strategyname_64.png.

I then restarted GitLab and on the login page I now see a button for our new provider (which works, yea!) but the images that I uploaded aren't used for the button, instead a basic grey button is being used. I cannot find anything in any of the logs indicating that it's not able to find the image files and I've tried renaming the files using various cases. I also executed a rake assets:precompile RAILS_ENV=production but that didn't seem to make a difference.

Am I missing something to get these providers to be our graphics instead of the basic button element on the login page?

Reference instructions: https://github.com/gitlabhq/gitlabhq/blob/5-3-stable/doc/install/installation.md