Add NVM configuration that matches WVUI, Popups, MobileFrontend to
specify the expected Node.js version when working with this repo. The
Node.js version chosen for Vector is identical to these projects as it
does not seem beneficial to differ at this time.
Bug: T257647
Change-Id: I0653c596ca74c0fb1ace4a6a6b08474daaff4f71
Stephen Niedzielski