How to prevent delete uploaded images(by paperclip) when depoly?

[ChangJoo-Park]

Hello I use mina with paperclip.

...
set :shared_files, fetch(:shared_files, []).push('config/database.yml', 'config/secrets.yml')
set :shared_dirs, fetch(:shared_dirs, []).push('public/system')
...
desc "Deploys the current version to the server."
task :deploy do
  # uncomment this line to make sure you pushed your local branch to the remote origin
  # invoke :'git:ensure_pushed'
  deploy do
    # Put things that will set up an empty directory into a fully set-up
    # instance of your project.
    invoke :'git:clone'

    fetch(:shared_dirs, []).each do |linked_dir|
      command %{mkdir -p #{File.dirname("./#{linked_dir}")}}
      command %{rm -rf "./#{linked_dir}"}
      command %{ln -s "#{fetch(:shared_path)}/#{linked_dir}" "./#{linked_dir}"}
    end

    # Workaround for https://github.com/mina-deploy/mina/issues/452
    fetch(:shared_files, []).each do |linked_path|
      command %{rm -f "./#{linked_path}"}
    end

    invoke :'deploy:link_shared_paths'
    invoke :'bundle:install'
    invoke :'rails:db_migrate'
    invoke :'rails:assets_precompile'
    invoke :'deploy:cleanup'

    on :launch do
      command "sudo service #{fetch(:user)} restart"
    end
  end

  # you can use `run :local` to run tasks on local machine before of after the deploy scripts
  # run :local { say 'done' }
end

...

this is my deploy.rb

How can I prevent from removing my uploaded images?

[ChangJoo-Park]

Add
set :shared_dirs, fetch(:shared_dirs, []).push('log', 'public/system')

this line in deploy.rb