I'm trying to follow this tutorial which would enable me to host this parametric typeface modulator myself.

The tool is a JavaScript powered web interface, a Sinatra based backend and a unix tool chain that generates the preview and output fonts.

I'm on macOS, and I believe I've installed all the required prerequisites.

The MySQL database has been created but I'm not sure where I to find config/db.yml so that I can replace it with db.yml.sample

Have I installed one of the prerequisites incorrectly? They're all located in the repository that I cloned from GitHub in my /user folder.