chore(build): use webpack to copy assets to target folder

package.json

@@ -22,7 +22,6 @@
     "lint": "run-s lint:js lint:ts",
     "lint:js": "eslint -c .eslintrc.yml *.js ./server",
     "lint:ts": "tslint './src/**/*.ts'",
-    "postbuild": "./bin/postbuild.copy-assets.sh",
     "posttest": "run-s coverage:html coverage:lcov",
     "prebuild": "run-s clean:target test",
     "pretest": "run-s clean:coverage lint",
@@ -53,6 +52,7 @@
     "@types/node": "~6.0.46",
     "@types/request": "0.0.30",
     "autoprefixer": "~6.5.1",
+    "copy-webpack-plugin": "~4.0.1",
     "coveralls": "~2.11.14",
     "cross-env": "~3.1.3",
     "css-loader": "~0.25.0",

webpack.config.js

@@ -4,6 +4,7 @@ const path = require('path');
 const autoprefixer = require('autoprefixer');
 const CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin');
 const ContextReplacementPlugin = require('webpack/lib/ContextReplacementPlugin');
+const CopyWebpackPlugin = require('copy-webpack-plugin');
 const DefinePlugin = require('webpack/lib/DefinePlugin');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
@@ -124,6 +125,9 @@ if (ENV_DEVELOPMENT || ENV_PRODUCTION) {
       name: ['vendor', 'polyfills'],
       minChunks: Infinity
     }),
+    new CopyWebpackPlugin([
+      {from: './assets/favicons', to: '.'}
+    ]),
     new HtmlWebpackPlugin({
       chunkSortMode: 'dependency',
       filename: 'index.html',