Add favicon

webpack.config.js

@@ -6,6 +6,7 @@ const path = require('path');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
   template: './client/index.html',
+  favicon: './client/favicon.ico',
   filename: 'index.html',
   inject: 'body'
 })