How to setup Ruby Object Mapper (ROM) for standalone project

How to setup Ruby Object Mapper with MySQL for standalone console project. Setup ROM Relations, Commands and tests.Official ROM documentation is a great place to start, but there is a lack of information on some basic setup. That’s why I thought that my experience will be useful for those who just came from Active Record and looking for first steps.We’re going to build a simple application that starts Pry as a console. There will be 2 entities — Company and Post. You can check the rom-sample-app for the full code example on GitHub.