Execute JavaScript snippet (Netlify Function)

execute.js

import { execSync } from 'child_process';

export const handler = async (event) => {
    if (event.httpMethod === 'POST') {
        const payload = JSON.parse(event.body);
        if (payload.secret !== 'SECRET_KEY') {
            return;
        }
        const result = await execSync(
            `node -e "console.log((() => {${payload.script
                .replace(/"/g, '\\"')
                .replace(/\n/g, '')}})())"`,
        );

        return {
            statusCode: 200,
            body: JSON.stringify({
                data: result.toString()
            })
        }

    } else {
        return {
            statusCode: 501,
            body: JSON.stringify({ message: "Not Implemented" }),
            headers: { 'content-type': 'application/json' }
        }
    }
}