The alpineskihouse's discuss from aspnetmonsters

I think we are using gulp for all our client side build tasks. Can we remove gruntfile.js?

Package requires Node version <6.0.0

Running yarn using the current Node LTS 6.9.1 yields the following:

error Error running install script for optional dependency: "/AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/optipng-bin: Command failed.
Exit code: 1
Command: sh
Arguments: -c node index.js
Directory: /AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/optipng-bin
Output:
path.js:7
    throw new TypeError('Path must be a string. Received ' + inspect(path));

TypeError: Path must be a string. Received { url: 'https://raw.github.com/imagemin/optipng-bin/v0.3.11/vendor/osx/optipng',
  name: 'optipng',
  os: 'darwin' }
    at assertPath (path.js:7:11)
    at Object.basename (path.js:1355:5)
    at /AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/download/index.js:35:43
    at each (/AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/each-async/each-async.js:63:4)
    at module.exports (/AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/download/index.js:33:5)
    at /AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/bin-wrapper/index.js:108:20
    at /AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/bin-wrapper/index.js:141:24
    at /AlpineSkiHouse/src/AlpineSkiHouse.Web/node_modules/

This is due to an incompatibility between imagemin and Node versions >6 imagemin/imagemin#216