[add] webapp on localhost:10501 (default)

webpack.dev.js

@@ -0,0 +1,10 @@
+const merge = require('webpack-merge');
+const common = require('./webpack.common.js');
+
+module.exports = merge(common, {
+  mode: 'development',
+  devtool: 'inline-source-map',
+  devServer: {
+    contentBase: './dist',
+  },
+});