How to use FxDK Yarn

While I am working in the CFX DevKit for FiveM, I am unable to get my plugin running because yarn is attempting to do some building with my project. This only happens when I have a package-lock.json in my directory: I am not sure how to get around this. The documentation only mentions that there is Node 12, and yarn compiles things. What do I need so that yarn recognizes my plugin (or am I suppose to tell yarn to ignore my package-lock.json somehow)?

I dug around, and found that I might need to have a yarn_cli.js file created in my project folder… but it’s not clear how I can connect this to yarn…