Move up all sources in src directory.

src/bootstrap.config.less

@@ -1,2 +1,2 @@
 @pre-border-color: @pre-bg; // hide the border.
-@import "../less/main.less";
+@import "./main.less";

webpack.config.js

@@ -4,7 +4,7 @@ const HtmlWebpackPlugin = require('html-webpack-plugin');
 
 module.exports = {
     context: path.resolve(__dirname, 'src'),
-    entry: './js/app.js',
+    entry: './app.js',
     devtool: 'source-map',
     module: {
         rules: [{