Server runtime crashes if /content-element accessed without cookie #12
Description
To reproduce, run pnpm dev in example, then run curl -i localhost:8030/content-element. The server responds with a 400 and the message "cekClientId cookie is missing" as expected, but the server runtime continues to attempt to process the request, and crashes when it looks for the nonexistent cookie value. The expected result is that a cookie-less request should return the 400 status and end the request processing.
The use case is attempting to run a health check against the individual runtimes, server runtime included. In the meantime, we can use the root url and expect the 400 status as confirmation of server health.