Allow the dev server to work for non localhost host (#2516)

This change is useful in order to access the live updating dev server from a mobile device that is not on localhost. A precursor to getting Android working.

support/webpack/config.js

@@ -23,6 +23,7 @@ const config = {
     contentBase: './examples',
     publicPath: '/',
     hot: true,
+    host: '0.0.0.0',
   },
   module: {
     rules: [