My custom config dir from my standard macOS setup. If I had more
time this would be better.
Setting up
When you run the git command below, you'll be prompted to install Xcode Command
Line Tools, which you should agree to (don't get "full" Xcode unless you want it).
If that doesn't work for some reason โ e.g. if you're at JCU and their update
server doesn't have it โ then go to https://developer.apple.com/download/more/,
find the lastest version of Command Line Tools, and download and install it.