Add a .nvmrc, which Netlify uses to determine Node.js version.
Add a .nvmrc, which Netlify uses to determine Node.js version.

While previously we used CircleCI to manage the deployment, and that
came with its own ability to choose the Node.js version through the
"circle.yml" config file, Netlify, which I intend to replace this Circle
deployment with, requires the use of a ".nvmrc" file with the Node.js
version.

Refs: 2358338684bdd32dd566e14b0fa2b0c8110e358c@5c048a81c70fdeed501fcce6d2c4c083df5c2e3d

Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor