Using rbenv

While it is highly recommended to use some sort of homogeneous environment for all members of the team (such as the virtual ones previously mentioned), a simpler and quicker way to create equivalent environments is to use some sort of Ruby version management tool. These types of tools allow us to install different versions of Ruby and for the most part will behave similarly, even if they are installed on different operating systems. We have a couple of options, but for simplicity, we will use rbenv: https://github.com/rbenv/rbenv.

rbenv allows us to install multiple versions of Ruby and manage these versions. By managing them, I mean we can define what version of Ruby the whole system uses (global), or we can define a specific version to be used on each project (local). For macOS and Linux users, you should follow the instructions on the previously mentioned GitHub repository, which also serves as the official website. If you run into any issues while trying to install...