This project generates a simple visualization of the common songs and artists between one or more Spotify playlists.
Make sure you have a Spotify for Developers account, and create a new application. Duplicate the .env.example file to .env, adding in your own credentials.
With Ruby installed, run bundle to install dependencies. Run the local Sinatra server using ruby myapp.rb, and visit the page at http://localhost:4567 using the default port settings.