CORE-419 fix webpack build

Author: kkartunov

.nvmrc

@@ -1 +1 @@
-16.15.0
+21.6.0

webpack.config.js

@@ -2,14 +2,15 @@
 const singleSpaDefaults = require("webpack-config-single-spa");
 const HtmlWebpackPlugin = require("html-webpack-plugin");
 const CopyWebpackPlugin = require("copy-webpack-plugin");
-const { merge } = require('webpack-merge');
+const { merge } = require("webpack-merge");
 
 module.exports = (webpackConfigEnv) => {
   const orgName = "topcoder";
   const defaultConfig = singleSpaDefaults({
     orgName,
     projectName: "mfe-core",
     webpackConfigEnv,
+    disableHtmlGeneration: true,
   });
 
   return merge(defaultConfig, {
@@ -26,7 +27,7 @@ module.exports = (webpackConfigEnv) => {
           secure: false,
         },
       },
-      index: '',
+      index: "",
     },
     plugins: [
       new HtmlWebpackPlugin({