Source code is largely based on this LinkedIn tutorial: Learning Spring with Spring Boot
Server is ready at http://localhost:8080/
Room reservations page: http://localhost:8080/reservations or http://localhost:8080/reservations?date=2022-01-01
Guests page: http://localhost:8080/guests
Get room reservations: GET /api/reservations or GET /api/reservations?date=2022-01-01
Get guests: GET /api/guests
Add a new guest: POST /api/guests, e.g. curl -X POST http://localhost:8080/api/guests -H 'Content-Type: application/json' -d '{"lastName": "Obama", "firstName": "Barack"}'