Using Sifon plugin to build + deploy Sitecore Link source code locally into Sitecore 10 with JSS 14
There is a step-by-step guidance at projects GitHub page on how to build deploy JSS source code into your local Sitecore 10 instance (https://github.com/MartinMiles/Siteco...)
But what if you are impatient just to get your local copy up and running? No problem - just get ready to use PowerShell script for Sifon tool that will do all mentioned step for you.