The way to install Project Lima to your new project is to download from NPM. This will put Project Lima as a module in your node_modules folder in which you can include JS and SCSS files into your build process.
There are two ways of downloading from NPM:
Command Line
In your command line programme, when you are pointed at the route of your project, type: npm i ecce-lima. To save to your package.json file add this to the end of that statement --save-dev.
Package.json file
In your package.json file, in the devDependencies object, add "ecce-lima": "latest", (if you need a specific version, replace the word latest with that version number). Now when you run npm i it will install Project Lima with the rest of your packages.