Add the .nvmrc file to facilitate the use of nvm

[frimro]

With .nvmrc the Node Version Manager (nvm) can be used to manage the NodeJS version dependency. Dependencies introduced in the package.json file have an implicit restriction on which NodeJS version(s) they can be used. The .nvmrc file makes this restriction explicit.

After installing nvm you can make use of this file by executing the following commands:

$ nvm install
$ nvm use

This installs and activates the correct NodeJS version for the project. After this npm install and gulp should work without a hitch.

Co-authored-by: Kimmo Tapala kimitri@gmail.com