Proposed database structure can be found here.
Make sure you have the latest stable ruby version which is currently for this project - 2.7.0
Go to the project's directory in your command line bundle install or simply bundle.
Find database.yml.sample and configure your own database.yml out of it.
Then run:
bundle exec rails db:create && bundle exec rails db:migrate
Launch Rails app:
bundle exec rails s
First you need to put a valid XML file(s) into <root_path_to_app>/files_to_process. Then go to something like http://localhost:3000/ and click the only link there. As it's done it will show you the status message in browser. After successful processing all files are put into <root_path_to_app>/files_to_process/processed directory.
You can run a few tests
bundle exec rspec