What is the correct way to (static) deploy a React App using Tomcat 9?

Question

I'm getting a blank page on every route in my app, not sure if it's the Router config issue or Tomcat config issue. Console does show all resources and built scripts, as well as the app title but the pages are blank.

App config:

package.json

"homepage": "/mpk-standalone",

App.js

import { BrowserRouter, Route, Routes } from 'react-router-dom'
            <BrowserRouter
                basename='/mpk-standalone'>
                <Routes>
                 //etc.

Tomcat config:

Tomcat 9.0\webapps\mpk-standalone\META-INF\context.xml

<?xml version="1.0" encoding="UTF-8"?>

<Context>  
  <Valve className="org.apache.catalina.valves.rewrite.RewriteValve" />
</Context>

Tomcat 9.0\webapps\mpk-standalone\WEB-INF\rewrite.config

RewriteRule ^/elapp/(.*)$    /index.html [L]

I googled a lot and searched on StackOverflow as well, all answers say that this config should work. But it doesn't for me. Is it wrong somehow?