Check and fix Tutorial + Survey

* [x] Toggle tutorial + survey back on, and make sure they work as intended
* [x] Also make sure, the user has options:
* Allow user to freeze either for a few days
* Allow user to ignore and discard them
* [x] Use [`firestore` REST API]() to store user results (if they consent)
* use `https` client: https://stackoverflow.com/questions/4940646/create-https-client-in-nodejs
* References
* https://firebase.google.com/docs/firestore/use-rest-api
* https://firebase.google.com/docs/firestore/reference/rest
* https://cloud.google.com/firestore/docs/reference/rest
* [Docs: createDocument](https://cloud.google.com/firestore/docs/reference/rest/v1/projects.databases.documents/createDocument)
* Serialization library for `firestore` rest calls: https://github.com/central182/firestore-rest-serdes
* [x] Add write-only rules
* [ ] Check if we can avoid spam with rules (e.g. max X requests in Y seconds) without `cloud function`
* References
* https://stackoverflow.com/questions/56487578/how-do-i-implement-a-write-rate-limit-in-cloud-firestore-security-rules
* https://stackoverflow.com/a/58895275/11309695