server – How to use Node.js to open, edit and save a text file from a webbrowser?

We are trying to manage a highscores file on the server. Every time a user sets a highscore it must be saved in a text file. But we are stuck with Node.js. From the command line using the node command on our own computer it is possible to open a file using the following javascript code, how to get it running in a webbrowser?

const fs = require('fs');

// Specify the file path
const filePath="c:/highscores.txt";

// Read the file asynchronously
fs.readFile(filePath, 'utf8', (err, data) => {
  if (err) {
    console.error('Error reading the file:', err);

console.log('File content:', data);

We tried to import the Node.js module in an HTML script but the console replied it is not allowed to use a local module.

<!DOCTYPE html>
<title>File Reading and Writing</title>
<script type="module" src="\Program Files\nodejs\node_modules\npm\node_modules\postcss-selector-parser\dist\selectors\node.js"></script>

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