Added source map of webpack so that the browser doesn't complain anymore

webpack.config.js

@@ -15,8 +15,10 @@ module.exports = (env, argv) => {
             filename: "[name].[contenthash:10].js",
             path: path.resolve(__dirname, "dist"),
             clean: true,
-            publicPath: '/'
+            publicPath: '/',
+            sourceMapFilename: "[name].js.map"
         },
+        devtool: "source-map",
         devServer: {
             historyApiFallback: true
         },