windows webpack error fix (#2923)

* index.html => main.html for windows users to avoid webpack error

* uploading example

Co-authored-by: Jack <jack@monkeytype.com>

frontend/webpack/config.base.js

@@ -106,7 +106,7 @@ const BASE_CONFIG = {
     }),
     new HtmlWebpackPlugin({
       filename: "./index.html",
-      template: resolve(__dirname, "../static/index.html"),
+      template: resolve(__dirname, "../static/main.html"),
       inject: "body",
     }),
     ...htmlWebpackPlugins,