Firewall demo hidden release INTER-378

[JuroUhlar]

This is a prelimanary "hidden/test release" PR:

• The style/design is still a prototype but the functionality itself, backend code and tests should be polished and up to standard.
• The demo is available on https://staging.fingerprinthub.com/bot-firewall but hidden from navigation.
• The intention is to merge this into production to test it on the production domain, subscription, Cloudfront and Cloudflare distributions. Then once the final design is ready and everything is tested, I will create a follow up PR to make the final pretty version visible to users.

Some notes about the changes:

• Running the production server on Digital Ocean will now require running a node-cron process in parallel.
• The e2e test for this use case uses staging.fingerprinthub.com and runs in Chrome only (running multiple instances of of it in parallel leads to failures as they access the same Cloudflare site settings).

All feedback welcome! I tried to explain my choices in the comments but I might have missed a better way to do something. Thanks!