Add browse rentrypoint that does not use widget API

src/browser.js

+/* Copyright 2021 Dominik George <nik@naturalnet.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import Game from './frontend/game';
+
+const width = 800;
+const height = 600;
+
+let game = new Game(width, height, backend);

webpack.config.js

@@ -3,7 +3,8 @@ const HtmlWebpackPlugin = require('html-webpack-plugin');
 
 module.exports = {
   entry: {
-    widget: './src/widget.js'
+    widget: './src/widget.js',
+    browser: './src/browser.js'
   },
   plugins: [
     new HtmlWebpackPlugin({