How to install Yarn on Debian 9

Yarn is a JavaScript package manager compatible with npm. It was created to solve a set of problems with the npm such as speeding up the packages installation process by parallelizing operations and reducing errors related to network connectivity. In this tutorial we will guide you on how to install Yarn on a Debian 9 system via the Yarn APT package repository. The official Yarn repository is consistently maintained and provides the most up-to-date version.