This plugin will skip Rails assets precompilation by creating a manifest file and it'll also make sure nodejs buildpack won't be downloaded by removing nodejs buildpack from the list.
Rather than pushing the code, we can just rebuild to test this plugin:
dokku ps:rebuild image_name
# Install
sudo dokku plugin:install https://github.com/amree/dokku-skip-rails-assets.git
# Uninstall
sudo dokku plugin:uninstall skip-rails-assets