A ideia é interessante, mas ao tentar realizar a autenticação, dá um erro simples que derruba o container:

All models were synchronized successfully.
!!WebServer Started!!
/app/node_modules/whatsapp-web.js/node_modules/puppeteer-core/lib/cjs/puppeteer/node/BrowserRunner.js:299
            reject(new Error([
                   ^

Error: Failed to launch the browser process! spawn /app/node_modules/whatsapp-web.js/node_modules/puppeteer-core/.local-chromium/linux-1045629/chrome-linux/chrome ENOENT


TROUBLESHOOTING: https://github.com/puppeteer/puppeteer/blob/main/docs/troubleshooting.md

    at onClose (/app/node_modules/whatsapp-web.js/node_modules/puppeteer-core/lib/cjs/puppeteer/node/BrowserRunner.js:299:20)
    at ChildProcess.<anonymous> (/app/node_modules/whatsapp-web.js/node_modules/puppeteer-core/lib/cjs/puppeteer/node/BrowserRunner.js:293:24)
    at ChildProcess.emit (node:events:518:28)
    at ChildProcess._handle.onexit (node:internal/child_process:291:12)
    at onErrorNT (node:internal/child_process:483:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)

Node.js v22.18.0