Fixes before the 2025-01-29 demo
Two late fixes were necessary:
- Allow CORS access to server-public-keys -- should have been completed in !1 (merged) already, not sure why that didn't suffice (either a stale build was used in testing, or CORS rules for localhost are more different than I thought).
- Populating the public server at keycloak.coap.amsuess.com worked best using an extension of the playground scripts.