config-overrides.js

const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');
module.exports = function override(config, env) {
    //do stuff with the webpack config...
    config.resolve.fallback = {
        fs: false
    }
    config.plugins.push(new MonacoWebpackPlugin({
          languages: ['c', 'java', 'scala', 'shell', 'python', 'json', 'sql',
              'xml', 'yaml', 'go', 'php', 'typescript', 'javascript']
      }));
    config.module.rules.push({
            test: /\.m?js/,
            resolve: {
                fullySpecified: false,
            },
        });
    return config;
}