A departure board is the excuse. The demo is the wiring: three Central Station apps, and the platform mechanisms that connect them. The board you are looking at is Next.js and holds no data. It calls perron-api, a public Go service, which in turn reads perron-poller — Internal Only, holder of the NS API key, and unreachable from any browser on earth.
None of them has an address hardcoded. Central Station injects every URL when you create a service link, and creating the ingress-mode link from this board is also what made the platform inject CORS_ORIGINS into the API. Open the Platform panel at the bottom to see the real injected values, read out of the running pods rather than from what we hoped happened.